Malicious PDF — malware analysis report

Static analysis result for SHA-256 94063f74cf457676…

MALICIOUS

PDF

50.6 KB Created: 2020-08-19 18:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 332d8de9edf5e10949f3c392e2feb97e SHA-1: fcf785faed8d8d1b62a356de668276299b996db7 SHA-256: 94063f74cf4576760a4e274a021582ab94519a8dd6ba69e85a416b51de4d343f
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same lure text as the malicious URL, suggesting an attempt to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer a phishing or redirection attack.

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.cc/pify?keyword=learn+french+by+podcast+pdf+lesson+2
    • http://files.davidformanproject.com/uploads/1/3/0/8/130814980/2333998.pdf
    • http://vixes.swallowunionapt.org/uploads/1/3/0/8/130814328/495da1a.pdf
    • http://tavajuna.makeitrainbitcoins.com/uploads/1/3/0/7/130740025/5120497.pdf
    • http://files.teamelectron.com/uploads/1/3/1/3/131378918/mipiniradib-wajopa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2086/9019/files/perimeter_of_a_rectangle_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/modoxamirumaturafukafew.pdf
    • https://cdn.shopify.com/s/files/1/0432/8603/6635/files/veketas.pdf
    • https://cdn.shopify.com/s/files/1/0441/3535/0424/files/43334423704.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5991/files/kosigekevanejozir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/voxonugufakisig.pdf
    • https://cdn.shopify.com/s/files/1/0454/3682/9854/files/british_english_accent.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/aprender_a_dibujar_animales_paso_a_paso.pdf
    • https://cdn.shopify.com/s/files/1/0448/1748/1888/files/pharmacovigilance_interview_questions_and_answers_for_freshers_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/4909/8148/files/zusutazoguzub.pdf
    • https://cdn.shopify.com/s/files/1/0435/3101/0199/files/4716167828.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007981.bin
ec1c2f8925f7a07a26677a2866dd8737b5750f6aab2f0ab325ea603ec7419ea4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7981 5296 bytes
font_01_sfnt_off00008b76.bin
530ebbb5505be0e0395bbcbe479db2efa2c8d10f2862d2642b294928aad3234c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B76 10408 bytes
font_02_sfnt_off0000af00.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF00 4324 bytes

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