Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1f7745d58998d1…

MALICIOUS

PDF

52.5 KB Created: 2020-08-30 12:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c515046e914e50ad0e155ac7faa4f09 SHA-1: 63295d4dfcf3a34cba04a064a27b17893dba85e7 SHA-256: 0b1f7745d58998d14f363fda2353bba473773c769f6a4756098383a1a5e11195
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This indicates an attempt to direct the user to malicious content, likely for phishing or malware delivery.

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.ru/wix?keyword=btl+vanquish+me+user+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_59576f33e5104edd9ab1cbd62367a1f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce1ce81e67c94c0eb1b774aeb30db866.pdf
    • https://static.usrfiles.com/ugd/902d29_4d3e73251171470e9f80bd92477fb202.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0316/files/63786720816.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6605/files/zujezin.pdf
    • https://cdn.shopify.com/s/files/1/0435/8805/9293/files/44274030202.pdf
    • https://cdn.shopify.com/s/files/1/0440/6624/2710/files/zalofilibalotovezegasup.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0d5f7a0aaf34f9e8a31f1af57986d26.pdf
    • https://static.usrfiles.com/ugd/374ce0_91293b5d8f2045c6a6b3b5bc4e1b7dad.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d9ff9cda2bc4181aee707072540467a.pdf
    • https://cdn.shopify.com/s/files/1/0436/3524/5214/files/winalenobevof.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4624/files/76586935143.pdf
    • https://cdn.shopify.com/s/files/1/0460/7236/5220/files/dictionary_of_pronunciation_norman_lewis_free_download.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007424.bin
9305235a2946b64d3712ac7f52c969e228830b7eb1b924403b2fe5d749bc13b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7424 5160 bytes
font_01_sfnt_off0000858b.bin
5fee4b1954287475fff5f834c9c0305378c06b3b9314f6f3dfb2d5e56ded8780
pdf-font-stream PDF embedded font (sfnt) at offset 0x858B 11236 bytes
font_02_sfnt_off0000ab9b.bin
247cce20069da0497186a7bc62e7a6adf0e857f36aa2255a78d8e1b7dc71e5c5
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB9B 17376 bytes