Malicious PDF — malware analysis report

Static analysis result for SHA-256 23887139d9b76c80…

MALICIOUS

PDF

52.7 KB Created: 2020-08-15 04:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c765df672861ee0dab6a0edefae661a2 SHA-1: 1ce35d0dd6d049c6223efdad5fff0d3ceb5584c3 SHA-256: 23887139d9b76c80ff9c540e661391225e5cb78682f844bbe4288b6435a53d5c
152 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded links, with at least one identified as a malicious redirector. The ML classifier strongly indicates maliciousness. The primary attack pattern appears to be a link farm or SEO poisoning technique, leveraging numerous Shopify-hosted PDFs to distribute malicious links, including one pointing to 'ttraff.com'. 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.com/pify?keyword=affine+transformation+example+c%252B%252B
    • http://files.nicolefranz.com/uploads/1/3/1/3/131380870/3047437.pdf
    • http://files.diannasdiapercakes.com/uploads/1/3/2/6/132682655/5b009f843c8d7.pdf
    • http://files.adoxian.com/uploads/1/3/1/4/131406086/nolirereweto-zujodatosamono.pdf
    • http://fafatozit.mrmsworkshop.com/uploads/1/3/2/3/132303374/7a6df.pdf
    • http://files.venta-oprema.com/uploads/1/3/0/8/130874329/6301135.pdf
    • https://cdn.shopify.com/s/files/1/0430/7448/6421/files/20273819776.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96704933611.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6647/files/acr_forms_rajasthan_govt.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5351/files/80950560276.pdf
    • https://cdn.shopify.com/s/files/1/0435/3861/2378/files/70213557582.pdf
    • https://cdn.shopify.com/s/files/1/0432/0247/8237/files/cours_administration_systme_sous_windows.pdf
    • https://cdn.shopify.com/s/files/1/0436/8669/0969/files/tudakito.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/rosubujanikogowanemafiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7741/0720/files/kivabuvegujebevan.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/pelisipomorizipepabufi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/components_of_balance_of_trade.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/38914826102.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/
    • https://cdn.shopify.com/s/files/1/0431/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000874a.bin
bb3aa29964978c23d0ba750bb005cc60ccb6e3cea7123e1d6980c1e2d1de5c0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x874A 5216 bytes
font_01_sfnt_off000098f1.bin
45c15c88881503d0203dd2f3a9869c70e8d1e2cc192a7d42cded62ba7e89a431		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98F1 13612 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.