Malicious PDF — malware analysis report

Static analysis result for SHA-256 75275924ecb2d922…

MALICIOUS

PDF

44.7 KB Created: 2020-08-21 03:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a48548480f8b028aceb4e884d35a3d56 SHA-1: 9c50295ba05cbe89b018f291c01765ae3ca7bd50 SHA-256: 75275924ecb2d92238834e9a11b9fe9be5219273c36ad8f9c117fafe12cbe27e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector URL. The document body, though heavily obfuscated, contains the same malicious URL and references to 'hotstar live tv movies free', suggesting a lure. The presence of a link farm further indicates malicious intent, likely to distribute malware or engage in phishing. No scripts were extracted, but the PDF structure itself is used to host malicious links.

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=hotstar+live+tv+movies++free
    • http://files.fyldecoastrunners.com/uploads/1/3/1/4/131438604/5ac7903.pdf
    • http://jawobuvag.mcconnellgrouppr.com/uploads/1/3/2/8/132816036/6450e773.pdf
    • http://files.aroundthepros.com/uploads/1/3/0/8/130814769/guzujofawutef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9927/5935/files/filobelalalegek.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/lojap.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/rokajapulosil.pdf
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/15871887594.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/new_cg_song_hd_video.pdf
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/965075749.pdf
    • https://cdn.shopify.com/s/files/1/0430/8094/1721/files/lefilobumumuwifuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/peparinefijizoku.pdf
    • https://cdn.shopify.com/s/files/1/0431/9887/3762/files/kinuvivawinolikowuse.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5359/files/birth_control_options_spanish.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073b0.bin
3046c633f275806b0a15fa27f5de8b0a4608c3fdb61059335468051e7a0f669e
pdf-font-stream PDF embedded font (sfnt) at offset 0x73B0 4932 bytes
font_01_sfnt_off00008464.bin
a0e66b9811705a01e10216d1c742171f88cec534c0446500859ea4053db5b534
pdf-font-stream PDF embedded font (sfnt) at offset 0x8464 9980 bytes