Malicious PDF — malware analysis report

Static analysis result for SHA-256 7765b09d2cf81726…

MALICIOUS

PDF

53.3 KB Created: 2020-09-10 03:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 425c89d0f6c4b8406af8d1e6a24b3fbf SHA-1: 557dc51728521f421503889b878a190981d969c5 SHA-256: 7765b09d2cf81726f8e104e35b1e25f70b03462859cfb22ba267c0c309158ceb
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous other links suggest an attempt to lead the user to a compromised or malicious site. The 'SE_CALLBACK_LURE' heuristic also indicates a potential phishing or scam pretext, although the specific lure text is obscured by binary data. No scripts were extracted, but the overall structure points to a malicious document designed to exploit user interaction via 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/wix?keyword=breville+espresso+maker+bes870xl+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/8de238_fa1033a8d3ed49449e2c1bccc6ebc57a.pdf
    • https://static.usrfiles.com/ugd/120f26_0fae805ee60d4e29928085e55d5fc0f9.pdf
    • https://static.usrfiles.com/ugd/64f9d2_38a11d48c7f3473eaa6d2d847fec9ae8.pdf
    • https://static.usrfiles.com/ugd/003b86_99afa2eed8804c42b3fbea9ec52d9488.pdf
    • https://static.usrfiles.com/ugd/77941b_485d39cb7d0547dfbd6f3012b1d79d88.pdf
    • https://cdn.shopify.com/s/files/1/0428/9236/1887/files/89914708906.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/kiluwitufot.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3563/files/97975020827.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/concone_lyrical_studies.pdf
    • https://static.usrfiles.com/ugd/fb5067_99712904d5ca472db6b39d263291cc0a.pdf
    • https://static.usrfiles.com/ugd/76de1a_beb038e5c45d45a98a5cc58bc9f639a4.pdf
    • https://cdn.shopify.com/s/files/1/0436/9675/0742/files/kazawogaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/41376607918.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/author_s_purpose_quiz_answers.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_off00008f1d.bin
0c96b569aac910b543db9e0a550c2677f897b47257e3cbad50b24046b92bcc1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1D 5760 bytes
font_01_sfnt_off0000a2ac.bin
dad9275eb67c79d0a42ba7b41fad9fd47bfcb385a85a1790e26e94877c9ca6da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2AC 11024 bytes

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