Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fcc4d2fd4113897…

MALICIOUS

PDF

51.2 KB Created: 2020-07-24 07:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 74cb6ba5ca6ad4cb5eb61d79289ca05f SHA-1: 4dab00042313c03a4b0f528365ebf394c76433ff SHA-256: 1fcc4d2fd4113897c2de7654ee49b1bc14e4c183d3a5f44a7edcdabb313b4138
194 Risk Score

Malware Insights

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

The PDF file, disguised as a 'Voting rights timeline worksheet', contains numerous embedded links. One of these links, 'https://ttraff.ru/wb?keyword=voting%20rights%20timeline%20worksheet', points to a known malicious redirector. The file also exhibits characteristics of a PDF SEO link farm, with 17 generated external PDF links, many hosted on cdn.shopify.com. This suggests a campaign to distribute malicious content through SEO-optimized PDFs.

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.ru/wb?keyword=voting%20rights%20timeline%20worksheet In PDF document text
    • http://files.avicraftwool.com/uploads/1/3/0/7/130775712/2f68c09d.pdfIn PDF document text
    • http://files.canadoretv.com/uploads/1/3/0/9/130969446/5290b.pdfIn PDF document text
    • http://files.wayashealingpath.com/uploads/1/3/1/8/131856012/gemolafukotezevo.pdfIn PDF document text
    • http://files.myececlass-safety.com/uploads/1/3/2/6/132695200/9656613a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/lubesigosaravejisaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8656/7841/files/molasariwisezuvakeleroli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/fijij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9802/0767/files/85477027000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7957/3414/files/89599584829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0265/8979/files/71730560195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8468/3166/files/wefedebapebeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/jogixusamewetirise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/34881575658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/jinuwekebuganerina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/fakudijabasomogijav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/femaferimezarezisazol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBF 4800 bytes
SHA-256: bc1d797772dd5a3dc1fd860c28363726e27efc63d2324d901b55956388fe0ac7
font_01_sfnt_off00009cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CEC 10048 bytes
SHA-256: 51e647fc0f203e73bb65fe0e2d393eab8f2198fb62f03822b38437c4cb95ede8

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