Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff87cb29d542dff6…

MALICIOUS

PDF

38.3 KB Created: 2020-08-19 00:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1639a91d86ae9533146d26b5b7039720 SHA-1: 9f0edbc1144956821af1c31c2ee2895628536836 SHA-256: ff87cb29d542dff6aec9f11265b2ba046db01d786a354f34aff06d05419b6961
152 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier as malicious and contains a significant number of embedded links, many pointing to Shopify domains but one critical link to a redirector at 'ttraff.ru'. The presence of a large link farm suggests an attempt to manipulate search engine results or distribute malicious content. No scripts were extracted, limiting the analysis of direct payload delivery.

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=aeon+flux+game
    • http://gubifulu.tasmantranscription.com/uploads/1/3/1/0/131071164/nonivewidubuwipejes.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3380/files/bawara_mann_dekhne_mayanadhi_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/58452538063.pdf
    • https://cdn.shopify.com/s/files/1/0447/4558/8887/files/b._s._a._m_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/3774/4552/files/20762131588.pdf
    • https://cdn.shopify.com/s/files/1/0431/2511/2994/files/jamexixibew.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6041/files/devuxagi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7878/5951/files/dekirakuperipajatiwu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/wigoleneterada.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/perexerisemiguza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kamunikizesow.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/navitadi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/95492864853.pdf
    • https://cdn.shopify.com/s/files/1/0450/6225/8851/files/94762946291.pdf
    • https://cdn.shopify.com/s/files/1/0435/5981/3279/files/mukizemuwalesusowexaxip.pdf
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/ielts_speaking_part_2_topics_with_answers_2020.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_off00005932.bin
ada71383945d0db38b4d4287affdf6730d94460ae2f5be2f12555025aa6fe816
pdf-font-stream PDF embedded font (sfnt) at offset 0x5932 4872 bytes
font_01_sfnt_off000069c1.bin
42c7b7619639e73f427bd686b28064d9f5e84867ffbede469695704547ce1992
pdf-font-stream PDF embedded font (sfnt) at offset 0x69C1 10164 bytes