Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a17c067c8923ce…

MALICIOUS

PDF

41.2 KB Created: 2020-08-02 03:34:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee066b338a500d44e72cd748720cc2cf SHA-1: a23dc5f0dba0846ff437ea981dd09fa506d63b0f SHA-256: 96a17c067c8923ceb0d861de5f0bc38008775cb677361903f463143b9279b9fb
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a large number of embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=git+squash+last+2+commits' which is associated with malicious redirector infrastructure. The presence of numerous links to Shopify domains suggests an attempt to create a link farm or distribute content through a seemingly legitimate platform.

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=git+squash+last+2+commits
    • http://files.arwarwick.org/uploads/1/3/2/8/132815388/58fb9ca2aa87.pdf
    • http://files.newsunyoga.co.uk/uploads/1/3/1/3/131384442/3a7fa725d.pdf
    • http://files.haleydesignillustration.shop/uploads/1/3/0/8/130874122/9004138.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3077/files/fictitious_business_name_orange_county.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libuzab.pdf
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/68259080131.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/68500293660.pdf
    • https://cdn.shopify.com/s/files/1/0433/0379/6894/files/79617346451.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7914/files/wumorudesifikedipu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2140/9184/files/60793630749.pdf
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/lokolojewisisipavumo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2402/files/7277778621.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/xeseposagenawuweba.pdf
    • https://cdn.shopify.com/s/files/1/0428/8308/8547/files/70166178222.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_off000062cc.bin
42384015f81d3b489ac8652c0c3beb041deffd18e4b01d3dfa64d1971fcdb3f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x62CC 5232 bytes
font_01_sfnt_off00007479.bin
bc039766f72c846975331129092abb98e00dfadbccc2433064e8f4ccc631981b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7479 10464 bytes