Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60e53f445ad37c7…

MALICIOUS

PDF

40.8 KB Created: 2020-08-08 20:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d21622aa9c8d3401c5637ef3ccc304b SHA-1: f91996a6587340bcab732aacfbc63302fc4b78b4 SHA-256: e60e53f445ad37c76e2af156f2e11ea6686fe8d3f11d755a29c63aad9b846c5c
152 Risk Score

Malware Insights

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

The PDF contains embedded links designed to lure users into downloading what appears to be a medical textbook. The primary link redirects to a known malicious redirector, ttraff.cc, which likely serves further malicious content. The document body and heuristics indicate a deceptive SEO-based lure to a malicious URL.

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=langman+s+medical+embryology+12th+edition+pdf+free+download
    • http://files.incorporationofmasonsofglasgow.org/uploads/1/3/1/8/131856769/buvekarazikatuba.pdf
    • http://files.newparkclosefrc.com/uploads/1/3/0/8/130814124/nexemixinere.pdf
    • http://files.prcpartners.net/uploads/1/3/1/3/131398360/rasivir.pdf
    • http://wegipuvat.natpearsonmusic.com/uploads/1/3/0/8/130815009/4832141.pdf
    • http://files.unioncongregationalucc.org/uploads/1/3/0/7/130739480/2ac5a.pdf
    • https://cdn.shopify.com/s/files/1/0432/2168/0283/files/tafasizivufodogewupawej.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7417/files/disc_diffusion_method_for_antimicrobial_activity_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0434/0593/4759/files/kth_smallest_element_in_a_bst.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/artificial_girl_3.pdf
    • https://cdn.shopify.com/s/files/1/0434/1704/3111/files/hillsong_united_oceans_chords.pdf
    • https://cdn.shopify.com/s/files/1/0437/3757/9674/files/54135008562.pdf
    • https://cdn.shopify.com/s/files/1/0443/0761/1804/files/massey_harris_pony.pdf
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/85282798229.pdf
    • https://cdn.shopify.com/s/files/1/0432/7591/1321/files/dimapewojebuleludiwogazi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1522/files/79525766416.pdf
    • https://cdn.shopify.com/s/files/1/0435/0722/0635/files/algebraic_topology.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/wiwisofoto.pdf
    • https://cdn.shopify.com/s/files/1/0433/5396/4712/files/46901479411.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_off00005256.bin
31eb400d1cbbd5d755c392deca6189f6f686f2a0da7dc6eb401ff84e083c6f2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5256 5816 bytes
font_01_sfnt_off00006608.bin
efd0ff8859b8088dc32543d557aa340dc2a704078ab119a4dd1181e41b95fe71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6608 9792 bytes
font_02_sfnt_off00008784.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8784 4324 bytes

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