Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5423cfb2508326e…

MALICIOUS

PDF

118.4 KB Created: 2020-07-30 23:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d66dd93fcad2efb500f2610e92230272 SHA-1: 77440a9a66718e91d1bb7fe576caca66e91e606b SHA-256: e5423cfb2508326e60eff1ac08422785a778536a8f133b0b22959f51a8c24eff
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains text suggesting a lure related to 'carbon dating method pdf'. The presence of a mass external PDF link farm further indicates a malicious intent to drive traffic to potentially harmful sites.

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=carbon+dating+method+pdf
    • http://files.markpetering.org/uploads/1/3/1/8/131856009/wejadavuwegefusuxe.pdf
    • http://files.buildinglastingmemories.com/uploads/1/3/1/4/131408798/b6675412.pdf
    • http://files.barkingpreschool.com/uploads/1/3/0/7/130738852/zuziz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5539/0630/files/serod.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/ronigusanasetuwagis.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2728/files/36589154773.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2773/files/jepowusobajudepo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4266/8698/files/gazobixegutotagef.pdf
    • https://cdn.shopify.com/s/files/1/0436/0939/1261/files/libuxo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3539/2150/files/retanowez.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9966/files/pakusuvaveralidif.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/detiruza.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/paxokawerawolumimeno.pdf
    • https://cdn.shopify.com/s/files/1/0435/8461/8653/files/96932451285.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017a1e.bin
312f249b3bef028cfafdb1688ca8d8b486b5e326549f220cc88ab7d955df0e26
pdf-font-stream PDF embedded font (sfnt) at offset 0x17A1E 5196 bytes
font_01_sfnt_off00018b98.bin
7fb2828d86ddead0f454fef7cb816238ee023db90e12ac598b2d70646bb69f29
pdf-font-stream PDF embedded font (sfnt) at offset 0x18B98 13432 bytes
font_02_sfnt_off0001b6bf.bin
5355995778af6fea050508ce4debc46bc2ba7deab687ac039556469e1bec84fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6BF 16064 bytes