Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca057e33e79c4b7…

MALICIOUS

PDF

48.5 KB Created: 2020-07-15 04:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 6f1f1bf787dfe5549b95b37971e65d49 SHA-1: 42281e46b5a27e149e2f538a1a7e95eed08a6af7 SHA-256: aca057e33e79c4b7479934b91dbafa6777df66178438997288d0d1d9189580ba
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links directs to a known malicious redirector at ttraff.com. The document body is heavily obfuscated and appears to be junk data, suggesting the primary purpose is to host these malicious links.

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/wb?keyword=diffusion%20and%20osmosis%20lab%20pdf%20answers In PDF document text
    • http://files.forgivenphotographymn.com/uploads/1/3/1/3/131398515/8082352.pdfIn PDF document text
    • http://files.cassidyraegaiter.com/uploads/1/3/0/8/130813616/xufukudisonix.pdfIn PDF document text
    • http://files.nileshsp.com/uploads/1/3/0/7/130776655/rafemibolisijas.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/1/0433/7899/9446/files/lezivolasuti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/80543629520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesitoxerevujadutag.pdfIn PDF document text
    • https://ponevigafoti.files.wordpress.com/2020/06/genowunikozabegaju.pdfIn PDF document text
    • https://pikilaguse.files.wordpress.com/2020/06/bakikipelobenip.pdfIn PDF document text
    • https://kedewemu291756887.files.wordpress.com/2020/06/49578063774.pdfIn PDF document text
    • https://keronurefaze.files.wordpress.com/2020/07/lixopitudifosan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zemeletitofugawekabol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/29840541096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2766/8890/files/xobesejajoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/nugarisivuzasabojeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/lizakitopukusegaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/siwizobudavegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/1575207852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2791/files/nexilujegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86662201832.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 6

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_off00008016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8016 5220 bytes
SHA-256: 9084851399eec68afb8e4b8489188ba37b2ff46c0cf132229ccc1c12af6c6aca
font_01_sfnt_off000091bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91BD 10244 bytes
SHA-256: 64a531df1db47c069bae497a348c8949c0bf68f75d83b8593dc45247c9f86e2c

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