Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e6ab636983e7e2…

MALICIOUS

PDF

47.1 KB Created: 2020-08-04 04:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 139201317f3aa94034fe046ab0cf003e SHA-1: b1490332221115b1562f05ac8f8869d512ea31b1 SHA-256: d5e6ab636983e7e231e40a8380feb1fb2af9449a19869a983dc77290191f2d8e
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=performance+appraisal+management+pdf'. This indicates a phishing or social engineering attempt to redirect the user to malicious content. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or distributing further 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.com/pify?keyword=performance+appraisal+management+pdf
    • http://files.hampshirepaintprotection.com/uploads/1/3/0/7/130776644/7393115.pdf
    • http://files.jodieoneill.com/uploads/1/3/0/8/130814279/wigipibolajixegur.pdf
    • http://files.bilianavoutchkova.net/uploads/1/3/1/3/131383581/8de25f41e7b0f.pdf
    • http://files.conniehurst.com/uploads/1/3/1/0/131070309/jelawofulun-fedepamefenupej.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/rusimajagof.pdf
    • https://cdn.shopify.com/s/files/1/0434/1035/8439/files/bejepowibegemafigokitifo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/29303290677.pdf
    • https://cdn.shopify.com/s/files/1/0440/1935/1710/files/korunopekisebawi.pdf
    • https://cdn.shopify.com/s/files/1/0438/6953/6411/files/27886722260.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0429/9676/0730/files/46497241282.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/27016265808.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6615/files/wejofilugawemunizukuseju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bebupikisanomagidilu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2780/7911/files/buwuzagezutejuzixifina.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_off00007a10.bin
0a2485c2e921858fdc56c3d185eda86229c01b08d744f6efcce74738cf37ddc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A10 5476 bytes
font_01_sfnt_off00008c93.bin
3d3297267f1727adcb2eec063afa0022e8b284aaf58b87954ae065acebba377f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C93 10332 bytes