Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d28dfd3820a2ff…

MALICIOUS

PDF

36.4 KB Created: 2020-08-07 14:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96e279ab17895d26a03c6db3c0c72667 SHA-1: cb17c9153c2fce69ee476e49261c5a5fdaa7dbdc SHA-256: 04d28dfd3820a2ff508efb2c1ea05e795696f7ed901c0320a9866936c3897479
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a specific malicious redirector URL, indicating an attempt to drive traffic to potentially harmful content. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the malicious URL and text suggesting a lure for a 'penguin dictionary of political science pdf'.

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=penguin+dictionary+of+political+science+pdf
    • http://fowidaka.jaidetimmgarcia.com/uploads/1/3/0/7/130775448/doxifew.pdf
    • http://files.diccklann.com/uploads/1/3/1/4/131407042/1407674.pdf
    • http://files.loveletterarts.com/uploads/1/3/1/8/131856627/4371977.pdf
    • http://files.thesavvywineshopper.com/uploads/1/3/1/6/131636689/lixevukepe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/46972488611.pdf
    • https://cdn.shopify.com/s/files/1/0429/2624/3996/files/alphabet_tracing_worksheet_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/39782550836.pdf
    • https://cdn.shopify.com/s/files/1/0439/7118/2750/files/teges.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5078/files/verses_on_friendship.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0296/files/49212352413.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0018/files/how_to_reduce_file_size_using_acrobat_dc.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/sims_makin_magic.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/40420568387.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3445/files/demuxebuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/genetic_engineering_b_d_singh.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/83033931063.pdf
    • https://cdn.shopify.com/s/files/1/0432/0254/3778/files/fabuzuxaginefewawuwaki.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/kuzinapupa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.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_off00004e19.bin
9bc426babe5cde9ce807fe994723083cfed573ca68684078741df8fafbdaf1a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E19 5428 bytes
font_01_sfnt_off000060ae.bin
0ded79dd8b49976ca551e99c7999217e3bd362e1dc4422156f79f69f6c72423d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AE 10508 bytes

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