Malicious PDF — malware analysis report

Static analysis result for SHA-256 0738fa22ecd697a5…

MALICIOUS

PDF

45.0 KB Created: 2020-08-15 07:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8de55681f0baa7358f04357a0ee66e15 SHA-1: 650f19711d5ca74db2b92a11cf0f463e090a7b7f SHA-256: 0738fa22ecd697a5fbe1fc3faacf3b647a68c9d1c762584e9e0284b7a5b187f3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though partially corrupted, includes the text 'Stock discrepancy report template' and the malicious URL, suggesting a social engineering lure. The presence of numerous other PDF links, many pointing to Shopify domains, indicates a potential link farm or content distribution strategy, further supporting the malicious intent.

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=stock+discrepancy+report+template
    • http://files.alexandradeglise.com/uploads/1/3/0/7/130739693/4917322.pdf
    • http://gumuw.123-give.com/uploads/1/3/0/9/130969149/repakisinawul.pdf
    • http://files.wangmoney.biz/uploads/1/3/1/6/131606175/6268601.pdf
    • http://files.spiritualtoolkit.com/uploads/1/3/2/7/132740997/c27d15831d4c.pdf
    • http://gunez.ensemblemusicahumana.com/uploads/1/3/2/7/132740214/sujuvid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/8960/7321/files/82721281791.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53262414385.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/31952900720.pdf
    • https://cdn.shopify.com/s/files/1/0437/1228/2789/files/25844443617.pdf
    • https://cdn.shopify.com/s/files/1/0432/4379/8683/files/work_experience_letter_template_year_11.pdf
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/vufimu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/51448171337.pdf
    • https://cdn.shopify.com/s/files/1/0437/5999/2990/files/the_wednesday_wars_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5546/files/48437959094.pdf
    • https://cdn.shopify.com/s/files/1/0435/4048/0155/files/8024084304.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/40219844247.pdf
    • https://cdn.shopify.com/s/files/1/0436/1987/7024/files/4800128064.pdf
    • https://cdn.shopify.com/s/files/1/0434/0819/5738/files/47077507788.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_off00007312.bin
2dd8da7e9ff11f861ec47023ca303cbc55c53e5b3cfad61d42c86bd7adc7586c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7312 5488 bytes
font_01_sfnt_off0000859e.bin
4a6802ccfb843ac2dd87104e319a54f71f96188f149d4fb2fe69263c348c5bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x859E 9852 bytes

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