Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec2778ad91a2f62…

MALICIOUS

PDF

52.2 KB Created: 2020-08-16 21:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79f69f6382e5c47815f5422c4363a69b SHA-1: c85cd37cc76564b820134138b536cacd7ce5908d SHA-256: 6ec2778ad91a2f6226d81a1ab2fbd52d6249e9f3f6eedadd2c9a1aab6e752eb8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one specifically pointing to a redirector service that is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Mgs university bikaner online exam form' and the malicious URL, suggesting a phishing or scam lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content.

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=mgs+university+bikaner+online+exam+form
    • http://files.my-pleiadian-this-n-that.com/uploads/1/3/1/4/131453111/7f9cd73.pdf
    • http://files.taraloveperry.com/uploads/1/3/0/7/130776338/tawosebofezum.pdf
    • http://gatajize.euphonymagazine.org/uploads/1/3/1/0/131070374/tupixegofonum_pazuwagaj_vigibefid.pdf
    • http://files.bellehale.com/uploads/1/3/0/7/130775387/jifedevijilo.pdf
    • http://gumok.sarahmansfieldphotography.com/uploads/1/3/1/8/131871825/0abcc6d9667c2e9.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/riterejejozikodedi.pdf
    • https://cdn.shopify.com/s/files/1/0444/4412/3303/files/arrest_search_and_investigation_in_north_carolina.pdf
    • https://cdn.shopify.com/s/files/1/0431/1980/4567/files/forensic_chemistry_suzanne_bell.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9435/1778/files/8308942338.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/3719513759.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/8976833364.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/tuwusurawerolupexanu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/bics_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0685/3269/files/61629328097.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a0f5.bin
57ba16bf8c4ec1b06976cb94b9927e54b003a3254c145157f5990c1dae2c9991		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA0F5 11388 bytes
font_00_sfnt_off00006b09.bin
d6a085c645d444f457f93a20825136862aea908dbf3f5458dd54edea2e4f7f09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B09 5528 bytes
font_01_sfnt_off00007dd9.bin
de42839d8c6580db76edadc9b4ff9229a99c4bf3003c06544d8f4d1697735d16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD9 10176 bytes

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