Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a92e9d613cd652…

MALICIOUS

PDF

68.1 KB Created: 2020-07-11 19:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 62168a0d637b216fee8af548a964e146 SHA-1: a51b0d78fc6edd1854ff3b16e24acce6d664f68b SHA-256: 49a92e9d613cd652ad246c4c9e515bac32dff85ba57baec96c3ed78b80809751
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL. This indicates the primary goal is to redirect the user to malicious content. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, likely for SEO manipulation or to host further malicious content.

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/pify?keyword=book+of+mormon+questions+and+answers In PDF document text
    • http://files.apprazrapp.com/uploads/1/3/1/4/131406430/feac20ae.pdfIn PDF document text
    • http://files.neilmckenzieyouthfishingcontest.org/uploads/1/3/1/6/131606127/1963708.pdfIn PDF document text
    • http://files.stewartvillefire.com/uploads/1/3/1/4/131407698/ee4cee66ac09.pdfIn PDF document text
    • http://files.askotzkytax.com/uploads/1/3/2/7/132710694/bff02.pdfIn PDF document text
    • http://files.roberthazelton.com/uploads/1/3/1/8/131871951/371b98903.pdfIn PDF document text
    • http://files.iamwowblingonabudget.com/uploads/1/3/1/3/131380045/871808.pdfIn PDF document text
    • http://files.apsexplore.com/uploads/1/3/1/8/131872048/1764738.pdfIn PDF document text
    • http://files.wilmingtonprintandmail.com/uploads/1/3/1/6/131637057/cd8bc305482.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://jexoxaluk.files.wordpress.com/2020/06/38136913213.pdfIn PDF document text
    • https://lesijasofu.files.wordpress.com/2020/06/fuxisaxexila.pdfIn PDF document text
    • https://bemafoxafo.files.wordpress.com/2020/07/geziwukanutosipeniwawus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4718/1718/files/faxojowoletuvifawudisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/51267364831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/luzotijelonipujipubakab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rixaraxamixenapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9092/0099/files/juvuroporaninuniwobavob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/rinupofenisetejavuliw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sovir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/ronubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/vojorudoduwedizomowawid.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_off0000cd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD89 5236 bytes
SHA-256: 70a106740de6e68897c249058551192b89ef804275531035ec6bf496845703ae
font_01_sfnt_off0000df48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF48 10488 bytes
SHA-256: eb49404f341f8b08b9c8919d6175768fd08044ef39d513ec3f4034ab0d2c4e75