Malicious PDF — malware analysis report

Static analysis result for SHA-256 089c08677f07a587…

MALICIOUS

PDF

105.1 KB Created: 2020-09-01 14:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c6d70149bfd1635b44d393a74ae4ea8 SHA-1: a81a6a11f3260c1c91f9629484be1d7247da2ef4 SHA-256: 089c08677f07a587f7004f00ac3481fa826dc8dbc112257a9cc025339e2fb905
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'activity 6 electric field simulation answers' and the malicious URL. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic, likely to obscure the malicious redirector.

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=activity+6+electric+field+simulation+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9957/7756/files/duretelakusetuxikoxino.pdf
    • https://cdn.shopify.com/s/files/1/0434/1389/7372/files/depude.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/60758198313.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8454/files/bixajavufowapudisem.pdf
    • https://cdn.shopify.com/s/files/1/0460/9707/2292/files/32206698364.pdf
    • https://cdn.shopify.com/s/files/1/0431/7295/4269/files/918280269.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/4116721450.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c723ba9a3f5462caa9481fd5195fafa.pdf
    • https://static.usrfiles.com/ugd/b8c837_607fbfb1d5f645238b825f8f09e0339f.pdf
    • https://static.usrfiles.com/ugd/e3834b_47258be76d84436ca00fbb180b05e597.pdf
    • https://static.usrfiles.com/ugd/b8c837_786234e29bcb4c4b8140c880d286c860.pdf
    • https://cdn.shopify.com/s/files/1/0431/7836/0987/files/fofaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/naromigesiroxesamuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/56551881586.pdf
    • https://cdn.shopify.com/s/files/1/0438/2588/9442/files/anatomical_positions_and_planes.pdf
    • https://cdn.shopify.com/s/files/1/0451/1285/2632/files/convert_to_word_zamzar.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_off00015f21.bin
adb325be13948c43db4bb323765223dcd825aba434caa6b62bcf4b6c80deb546
pdf-font-stream PDF embedded font (sfnt) at offset 0x15F21 5564 bytes
font_01_sfnt_off00017216.bin
4e9369493e3f23f5bef4ce3a0e8df7333f976e0dd199fba6a2e5e994d55cfddc
pdf-font-stream PDF embedded font (sfnt) at offset 0x17216 10760 bytes