Malicious PDF — malware analysis report

Static analysis result for SHA-256 a68e9bb31548c4da…

MALICIOUS

PDF

40.1 KB Created: 2020-10-04 11:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9471427c2be89b34261adc0f515fbc87 SHA-1: 6daa419215597e9ad1ae1561d28229d87d8dbf8c SHA-256: a68e9bb31548c4da121dc38545843c9c45057a398f8d8a03d70a56d80e64d2ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to link farms, with a critical heuristic identifying it as a malicious redirector. The primary URL, 'https://ttraff.club/pify?keyword=graph+of+tan', is a known malicious redirector. This suggests the document's purpose is to lure users to malicious sites, likely for phishing or to download further malware. The ML classifier strongly supports the malicious verdict.

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.club/pify?keyword=graph+of+tan In PDF document text
    • https://site-1043925.mozfiles.com/files/1043925/sozipitutufu.pdfIn PDF document text
    • https://site-1043165.mozfiles.com/files/1043165/37824243748.pdfIn PDF document text
    • https://site-1038684.mozfiles.com/files/1038684/20221027899.pdfIn PDF document text
    • http://files.marianneshows.com/uploads/1/3/0/7/130776460/392292ef5fa83.pdfIn PDF document text
    • http://files.carolavedonsavage.com/uploads/1/3/0/9/130969656/murevogatono.pdfIn PDF document text
    • http://files.robinmoulynart.com/uploads/1/3/2/6/132681698/peripaxes-foxidera-nizunezenun.pdfIn PDF document text
    • http://xuralo.38plus2productions.com/uploads/1/3/1/3/131398177/nejuwisugobad.pdfIn PDF document text
    • http://xufupexoj.cf4aass.org/uploads/1/3/0/8/130874370/pusura.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/1/0437/5665/0645/files/11717289438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9875/8567/files/60855967431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/82115236106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3062/5947/files/currency_exchange_los_angeles_international_airport.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4725/0837/files/takateropilikuvovotama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3399/7724/files/5997677356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5464/7446/files/37083838668.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_off000061e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E4 4808 bytes
SHA-256: c2898cd32ada07e9b57bc176a5377395eb4c038bbd257900b4ae7a6c5a7862dc
font_01_sfnt_off0000723d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723D 9828 bytes
SHA-256: b831d526d497eadd55ae427764c9f2c998156d992d712d200521c38ec5b71bf7

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