Malicious PDF — malware analysis report

Static analysis result for SHA-256 a695185386c1aef0…

MALICIOUS

PDF

45.1 KB Created: 2020-08-02 12:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1dc81f50346feddb97e11c4a5f89791 SHA-1: 52e704c76e14cbd7be35bbf96993ea533a793b47 SHA-256: a695185386c1aef02d04af2d2fd6899eadc799f33e4b3b6a7f60ed5e3441cf6b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the URL 'https://ttraff.ru/pify?keyword=power+king+tractor+parts', which is flagged as a malicious redirector. The presence of numerous links suggests an attempt to lure users to malicious sites.

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=power+king+tractor+parts
    • http://files.greaterchattanoogarobotics.org/uploads/1/3/0/8/130814784/eb86d2dd0f.pdf
    • http://files.nonreligiousspiritual.com/uploads/1/3/0/8/130813409/5ebaadbb65d0.pdf
    • http://files.johnmac13.com/uploads/1/3/0/9/130969300/321927.pdf
    • https://cdn.shopify.com/s/files/1/0431/1964/0738/files/xiworibakelamixopuvazigo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/gupukadaranizuwabanoxur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/minirefotapobizezuloxot.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0898/files/download_ie10_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0437/2935/4903/files/13250504834.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/16838637023.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31178329868.pdf
    • https://cdn.shopify.com/s/files/1/0433/9502/3013/files/pikuzi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/64229135382.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/pebalemogixezatugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/sexibefodojenom.pdf
    • https://cdn.shopify.com/s/files/1/0430/8339/9329/files/8574137737.pdf
    • https://cdn.shopify.com/s/files/1/0436/0034/7299/files/dubanomipolosutomuregowuf.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_off000072b9.bin
899ba297eca54ae06f120c2429a11cdaa7e8931d9bd779861559c9733b387773
pdf-font-stream PDF embedded font (sfnt) at offset 0x72B9 5228 bytes
font_01_sfnt_off000084ab.bin
09841f97c25fb8e709b146a08d31baa39e32393e07155722e7b40b43d00aa033
pdf-font-stream PDF embedded font (sfnt) at offset 0x84AB 10348 bytes