Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a6d9fb38530b0f…

MALICIOUS

PDF

36.7 KB Created: 2020-08-17 10:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16ed84e81dc445c9786bce153d9bb827 SHA-1: c30938361f191f11dc5aee38007727155cb804e4 SHA-256: 97a6d9fb38530b0f026a2c9a5ec949d9fdd0292b3260f2bd4677c89847816276
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to a 'South African police affidavit form' and the malicious URL itself, suggesting a social engineering lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination and potentially improve search engine ranking for malicious content.

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=south+african+police+affidavit+form
    • http://files.janusadvisoryinc.com/uploads/1/3/1/4/131437283/519929.pdf
    • https://cdn.shopify.com/s/files/1/0434/7792/6040/files/ketogene_dit_plan.pdf
    • https://cdn.shopify.com/s/files/1/0435/5879/7463/files/58997896923.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/update_all_fields_in_word.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/13695694925.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/58358725364.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/11613556042.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/widiwowinasotimiso.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/katupokol.pdf
    • https://cdn.shopify.com/s/files/1/0434/6452/3926/files/50035390697.pdf
    • https://cdn.shopify.com/s/files/1/0431/7400/2837/files/povobemojon.pdf
    • https://cdn.shopify.com/s/files/1/0439/8101/3150/files/20417557975.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/52357992940.pdf
    • https://cdn.shopify.com/s/files/1/0432/0837/6482/files/1572832049.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_off000051ac.bin
ef36398e0c5b056ac077d7202ee52479f15c16cc6ebffb90351fd80d155cfead
pdf-font-stream PDF embedded font (sfnt) at offset 0x51AC 5380 bytes
font_01_sfnt_off000063d2.bin
68fa8b39e859fd4595da619ce1f38435893aa75c23f0430169fedfb5c276836e
pdf-font-stream PDF embedded font (sfnt) at offset 0x63D2 10044 bytes