Malicious PDF — malware analysis report

Static analysis result for SHA-256 010ea3c4dec382e7…

MALICIOUS

PDF

40.4 KB Created: 2020-07-12 01:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 3e7423e89f4d02a78a9e8fd94ae69c04 SHA-1: b97b5dbbc1681846e764e8be37ae3ea1dff51abb SHA-256: 010ea3c4dec382e7107e619bbebd34855ff60ba68af29b63acc2ab2eebfc39ca
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to redirector infrastructure like 'ttraff.com'. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a tactic to artificially boost search engine rankings or distribute malicious content. The presence of a malicious redirector link and the ML classifier's high confidence score strongly indicate a malicious intent to direct users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=1125+angel+number In PDF document text
    • http://files.ukboerboelclub.co.uk/uploads/1/3/0/8/130814926/c308874b45.pdfIn PDF document text
    • http://files.clintlovell.com/uploads/1/3/0/7/130738562/4404206.pdfIn PDF document text
    • http://files.linencanvaspaper.com/uploads/1/3/2/8/132815118/5565361.pdfIn PDF document text
    • http://files.mauimotionpictures.com/uploads/1/3/2/8/132814505/nekupuwalaj.pdfIn PDF document text
    • http://files.nickpateras.org/uploads/1/3/2/7/132710655/d914f150ae.pdfIn PDF document text
    • http://files.amylchapman.com/uploads/1/3/0/8/130813972/jazivotivazatekakus.pdfIn PDF document text
    • http://files.amydawsbodywork.com/uploads/1/3/0/8/130874614/6883937.pdfIn PDF document text
    • http://files.lifewisegifts.com/uploads/1/3/0/8/130874128/6ab8d3.pdfIn PDF document text
    • http://files.divorcecoachingandconsulting.com/uploads/1/3/0/8/130874518/bejam-soselovorifat-tekumubobup-powidonuvewadar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://polosewus.files.wordpress.com/2020/06/porefek.pdfIn PDF document text
    • https://gaxugemudozo.files.wordpress.com/2020/07/96733235241.pdfIn PDF document text
    • https://potiniwuvo.files.wordpress.com/2020/06/tepoberiworiterifusukov.pdfIn PDF document text
    • https://pugurikerode.files.wordpress.com/2020/06/fefaxozudezopoleg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/54060167674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2682/4859/files/wodejodageniriwas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nomevorijodasulalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8306/2678/files/paligujanake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7193/0529/files/nawevoxajasekuxekuwed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/bigojowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fokadexowigexavutezirero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6245 4824 bytes
SHA-256: 7c9512a7d7e1c5be29ecbb11053811d1af3761a2061b996eb33e20e7547a3c38
font_01_sfnt_off0000727f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727F 9740 bytes
SHA-256: 3f29ab1c4f9f69e910ffb532c7bd58da1c05bfa0d24b6f5cb93a340f8566be69