Malicious PDF — malware analysis report

Static analysis result for SHA-256 81466aa467694d8f…

MALICIOUS

PDF

43.5 KB Created: 2020-08-09 03:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ebdb39ea977e8978249463eda33bbd2 SHA-1: 91a171b2acacf6d99abdced7aa79a41c2baa843d SHA-256: 81466aa467694d8f1f957ee5e196daaac4da2472a5f157aacb877d6b8d2cfa67
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary URL `https://ttraff.ru/pify?keyword=patriarchy+definition+sociology+pdf` identified as a malicious redirector. The document body is heavily obfuscated but appears to contain metadata related to the PDF's creation and the malicious URL. The presence of numerous links, many pointing to Shopify domains but likely serving as a link farm, strongly suggests a phishing or malware distribution attempt.

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/pify?keyword=patriarchy+definition+sociology+pdf
    • http://files.aclhandweaver.com/uploads/1/3/1/8/131856770/9349195.pdf
    • http://files.jeanluceartist.com/uploads/1/3/1/4/131437513/2909576.pdf
    • http://files.grasslaketrafficjamin.com/uploads/1/3/0/7/130738704/ropoxiro_gonuluz_silerelij.pdf
    • http://files.jaanemanart.com/uploads/1/3/1/0/131071252/vawobi-ganeporofi-pirazipaxaduvun.pdf
    • http://files.newleaforganizingllc.com/uploads/1/3/1/8/131857071/6418065.pdf
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/tuvukigadodiwukekekeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/4607/5542/files/dujokegutasu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9673/files/bukavupip.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/mowuzexipewewokunufalibu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/44771915412.pdf
    • https://cdn.shopify.com/s/files/1/0446/6815/8105/files/duwebamewimunobawezav.pdf
    • https://cdn.shopify.com/s/files/1/0431/5719/2853/files/10795344602.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/73918591460.pdf
    • https://cdn.shopify.com/s/files/1/0438/4355/1392/files/kajejiliso.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/78918436103.pdf
    • https://cdn.shopify.com/s/files/1/0446/5822/9411/files/tar_gz_unzip.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bac.bin
ab2db03f2554ed7b596391288cbd0b0af6ecaa7a010439fb25016ab6b63d8049
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAC 5520 bytes
font_01_sfnt_off00007e79.bin
216fe089eb2bf84f517c0505569bdc16f7381efa38d5fc9b54593fbbf3999ad7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E79 10100 bytes