Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ca2e852670f6e7…

MALICIOUS

PDF

43.2 KB Created: 2020-08-02 19:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 210ffb309a56974a69282694a7c1bec2 SHA-1: 7771061aa70987de3daf505111aee624509747e0 SHA-256: d7ca2e852670f6e7f71800d7f50f6c4e06fadf65fd69f486a2f248f0534d2284
154 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a large number of embedded URLs. One of these URLs, 'https://ttraff.cc/pify?keyword=countdown+timer+html+javascript', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify and other domains, suggesting a link farm designed to distribute malicious content or phish users. No scripts were extracted from this sample.

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=countdown+timer+html+javascript
    • http://files.changlaoshiclassroom.com/uploads/1/3/1/6/131607075/rozemuzivivuliwula.pdf
    • http://files.earthlyessentials.ca/uploads/1/3/1/4/131438260/luvanuxunobodu-fegulope-datanutinuwenir.pdf
    • http://files.mosquitosaregone.com/uploads/1/3/0/7/130775732/d9a8a562599.pdf
    • http://files.lonegalloper.com/uploads/1/3/1/3/131383456/pesigef-puzakixe.pdf
    • http://files.juliahobdayphotography.com/uploads/1/3/0/8/130874233/2730313.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/movudilekikexikobipone.pdf
    • https://cdn.shopify.com/s/files/1/0437/1641/1547/files/linirukapaxudalori.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/76116393663.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/82109990066.pdf
    • https://cdn.shopify.com/s/files/1/0434/8801/8594/files/70948484146.pdf
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/58306180664.pdf
    • https://cdn.shopify.com/s/files/1/0438/4551/7469/files/59374788000.pdf
    • https://cdn.shopify.com/s/files/1/0431/9376/1941/files/lelak.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_off00006917.bin
2ceb034d2af150ae58625a78471b90c1d20211568a38ca347281ce350b3770d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6917 5444 bytes
font_01_sfnt_off00007b83.bin
98903394f2a33b1ae5da5c18572b7ad342910ec1cc067ef35e55e45f074c2cc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B83 10788 bytes