Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c53e3106e23575…

MALICIOUS

PDF

50.3 KB Created: 2020-08-09 05:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5e090f005956249879e7122b780b2d4 SHA-1: 53047e0ac130aaffe9d1f6b59d6943f649a1a062 SHA-256: 78c53e3106e23575add7557f620e60742e1780d971823afe244ebdf4eebdfec9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector's target. The presence of multiple links suggests an attempt to lure users to potentially harmful websites, likely for phishing or malware distribution.

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=amylase+function+pdf
    • http://files.skincareboutiqueatfacestudioandwellnesscenter.com/uploads/1/3/0/7/130776828/sosasegiw-tapilupezadujol-dofog.pdf
    • http://files.broadchalkeparishcouncil.com/uploads/1/3/1/3/131380158/2524d8fcabd6.pdf
    • http://files.craigformissouri.com/uploads/1/3/1/6/131637953/2c3f4.pdf
    • http://files.idontmakejokesanymore.com/uploads/1/3/1/6/131636808/setepabajin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasebiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/72542397560.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/tv_listings_memphis_tn.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3854/files/zedodovilobo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3653/3151/files/lipid_oxidation_challenges_in_food_systems.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8913/files/892498433.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/easy_rock_piano_songs.pdf
    • https://cdn.shopify.com/s/files/1/0434/9735/7472/files/embryology_textbook_free.pdf
    • https://cdn.shopify.com/s/files/1/0447/9136/5792/files/mobile_attendance_system_project.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/24059828164.pdf
    • https://cdn.shopify.com/s/files/1/0430/7818/9205/files/84850270216.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/fomupiwizikujuziloxogut.pdf
    • https://cdn.shopify.com/s/files/1/0434/1868/1496/files/kijekejepobatizavogu.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_off000084b1.bin
c7f6f3f65d45108e7ebb13a97d1e8ede037e452bb72d6cc33783f3966a21f86c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84B1 5296 bytes
font_01_sfnt_off000096b5.bin
1352b392d8e2214f4843b4801d1d10b714f174e56e36f7a2c4d4fb84a6de4859		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96B5 11100 bytes

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