Malicious PDF — malware analysis report

Static analysis result for SHA-256 0761370903162430…

MALICIOUS

PDF

38.6 KB Created: 2020-08-04 17:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d43fe0dcdbe197356f96f4ac1af112a SHA-1: d0e063d833e88374d13101b01a5fd0a28e00be08 SHA-256: 0761370903162430deba52172e87871601bbfeed9942406253310ef9680563d2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to external resources, classifying it as a link farm. One of the primary links, 'https://ttraff.com/pify?keyword=although+in+spite+of+despite+exercises+pdf', is identified as a malicious redirector, indicating the document's intent is to lead users to harmful content. The presence of numerous Shopify links suggests an attempt to blend malicious links with seemingly benign ones.

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=although+in+spite+of+despite+exercises+pdf
    • http://files.ceresevents.org/uploads/1/3/1/4/131414743/wijabanivisukok.pdf
    • http://jesesat.lehmanathleticboosterclub.com/uploads/1/3/1/4/131438474/9cb0e81.pdf
    • http://files.jbirdmultisportcoaching.com/uploads/1/3/0/7/130740625/valof.pdf
    • http://files.fourpointsinc.org/uploads/1/3/1/3/131379591/bisexej_dugepubig_vovarigenata_jusutarijebupol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/6356279738.pdf
    • https://cdn.shopify.com/s/files/1/0431/7298/7046/files/15411683023.pdf
    • https://cdn.shopify.com/s/files/1/0434/4384/7328/files/58829082002.pdf
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/48680102004.pdf
    • https://cdn.shopify.com/s/files/1/0431/5709/4559/files/punjab_movie_2014.pdf
    • https://cdn.shopify.com/s/files/1/0437/0884/2152/files/gosutisunifojimivowi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/92161478626.pdf
    • https://cdn.shopify.com/s/files/1/0430/9359/0167/files/vugibumesikokaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/gopenudadesozop.pdf
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/27399750946.pdf
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/53238932204.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/pepusevin.pdf
    • https://cdn.shopify.com/s/files/1/0431/0849/9618/files/97943327079.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_off00005a33.bin
15f0a6b2540a6a7a40cae6e508e9b7673d65f8ff73edda22bba063f97af4c386		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A33 5264 bytes
font_01_sfnt_off00006c28.bin
8032fab4b0dc3f862696a415407b32a826dc46503a033d8037c1e4e8db0ae587		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C28 9708 bytes

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