Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c19ab080e61d267…

MALICIOUS

PDF

92.9 KB Created: 2020-08-09 13:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2eaa341e936456d2c6261d83f195165c SHA-1: adbed695f5f33baec8ee203d5ef2e4c5eb4b2780 SHA-256: 1c19ab080e61d26729547752e8351511e5b491fb698e6ad2647a83f874f8eb4c
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the ttraff.cc redirector, which is likely used to funnel users to further malicious content or phishing pages. The document body itself is largely unreadable binary data, but the presence of the URL within it confirms its role in the attack.

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=binary+logic+and+boolean+algebra+pdf
    • http://nenepe.westseattlecoworking.com/uploads/1/3/2/6/132682646/4883464.pdf
    • http://gavuja.whatdancecando.ca/uploads/1/3/0/8/130874038/6712206.pdf
    • http://files.nctreasurechest.org/uploads/1/3/1/4/131453316/7632114.pdf
    • http://files.leggingsandliterature.com/uploads/1/3/1/4/131452958/7570432.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/amiina_al_mufti_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/2466/1154/files/merolinegawogitujud.pdf
    • https://cdn.shopify.com/s/files/1/0452/2527/9648/files/nizavol.pdf
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/fodovemi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5892/1621/files/karepeduda.pdf
    • https://cdn.shopify.com/s/files/1/0437/0215/7466/files/keferavopafozor.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/3051647604.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/galokaratowuvaruwo.pdf
    • https://cdn.shopify.com/s/files/1/0445/5481/3599/files/already_gone_tab.pdf
    • https://cdn.shopify.com/s/files/1/0438/3608/0288/files/dokosagem.pdf
    • https://cdn.shopify.com/s/files/1/0430/7605/9290/files/3224524000.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7142/files/pinipijama.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_off00010eff.bin
3ab1bc5eafe1daf060bb61c064829170137dd83d727d01094047e720ffb7c275		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFF 5436 bytes
font_01_sfnt_off00012195.bin
73c35e3d74c6309c5640e5122f10494757af30fe10903da555e1db2f03ef8d3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12195 14464 bytes
font_02_sfnt_off00014f58.bin
b08f12d579e7fa2eff1a4c23ab83d218da6ef22505d113a4f5bca62f2d183f8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F58 16560 bytes

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