Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f2ac3021838279…

MALICIOUS

PDF

49.4 KB Created: 2020-08-25 04:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc6ab838104a7b11d826143f3013bc7d SHA-1: 36ec104cac24ca83776a9cc805db6711a1a3bff8 SHA-256: d5f2ac3021838279dbe32b51e4e4ed74f2175f54bfa6467bb78b550a6bb410cb
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm behavior, with numerous links pointing to Shopify-hosted PDFs, suggesting a content-spinning or link-distribution scheme. The ML classifier also strongly flagged this PDF as malicious. The embedded document body text, though partially corrupted, contains the malicious URL and references a video game guide, indicating a lure.

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=horizon+zero+dawn+frozen+wilds+trophies+guide
    • http://zekokif.goldenreiki.co.nz/uploads/1/3/1/4/131438304/dorebevofejinezeg.pdf
    • http://files.llabands.com/uploads/1/3/2/7/132712147/nubizulowuwagu.pdf
    • http://files.sgbcpc.com/uploads/1/3/0/9/130969459/rosuzob_vopuvew_pefub.pdf
    • http://ferego.ltcsoftball.com/uploads/1/3/0/7/130776457/kobobatinepimosorof.pdf
    • http://nafazo.charmed-liebling.com/uploads/1/3/1/3/131384306/1179549.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2243/files/bisegutazuseruxikikewedad.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1767/files/physical_science_10th_edition_tillery.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/a_word_wallpaper_hd.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/6891426662.pdf
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/ritoziraf.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/wusatexu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0661/3912/files/zobevodobelasokimanuza.pdf
    • https://cdn.shopify.com/s/files/1/0436/3006/7865/files/mivafivurinolotiwonososer.pdf
    • https://cdn.shopify.com/s/files/1/0438/3273/7942/files/sabexutebapididem.pdf
    • https://cdn.shopify.com/s/files/1/0431/6515/5489/files/hotel_california_ukulele_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/phn_mm_ct_ghp_min_ph.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/83009645351.pdf
    • https://cdn.shopify.com/s/files/1/0431/8871/5682/files/mobudodelo.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_off0000825d.bin
64970b04a87e65132dc7f084d21aeaf8948c99860ad2f80e23977477ce4d7b78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x825D 5404 bytes
font_01_sfnt_off000094d3.bin
31a9d12a9acaa9215b2f5e70ffb18ea717d6c9663ce77ec5fc2b38bb4b10a181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94D3 10480 bytes

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