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)
MD5: 3e7423e89f4d02a78a9e8fd94ae69c04 SHA-1: b97b5dbbc1681846e764e8be37ae3ea1dff51abb SHA-256: 010ea3c4dec382e7107e619bbebd34855ff60ba68af29b63acc2ab2eebfc39ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The PDF contains numerous embedded URLs, many of which point to link farms designed to distribute malicious content. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=1125+angel+number'. The ML classifier also strongly indicated maliciousness. The document body itself is heavily obfuscated and contains some of the same URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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
    • http://files.ukboerboelclub.co.uk/uploads/1/3/0/8/130814926/c308874b45.pdf
    • http://files.clintlovell.com/uploads/1/3/0/7/130738562/4404206.pdf
    • http://files.linencanvaspaper.com/uploads/1/3/2/8/132815118/5565361.pdf
    • http://files.mauimotionpictures.com/uploads/1/3/2/8/132814505/nekupuwalaj.pdf
    • http://files.nickpateras.org/uploads/1/3/2/7/132710655/d914f150ae.pdf
    • http://files.amylchapman.com/uploads/1/3/0/8/130813972/jazivotivazatekakus.pdf
    • http://files.amydawsbodywork.com/uploads/1/3/0/8/130874614/6883937.pdf
    • http://files.lifewisegifts.com/uploads/1/3/0/8/130874128/6ab8d3.pdf
    • http://files.divorcecoachingandconsulting.com/uploads/1/3/0/8/130874518/bejam-soselovorifat-tekumubobup-powidonuvewadar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://polosewus.files.wordpress.com/2020/06/porefek.pdf
    • https://gaxugemudozo.files.wordpress.com/2020/07/96733235241.pdf
    • https://potiniwuvo.files.wordpress.com/2020/06/tepoberiworiterifusukov.pdf
    • https://pugurikerode.files.wordpress.com/2020/06/fefaxozudezopoleg.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/54060167674.pdf
    • https://cdn.shopify.com/s/files/1/0432/2682/4859/files/wodejodageniriwas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nomevorijodasulalo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2678/files/paligujanake.pdf
    • https://cdn.shopify.com/s/files/1/0430/7193/0529/files/nawevoxajasekuxekuwed.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/bigojowi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fokadexowigexavutezirero.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

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

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