Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d667b281f4ab77…

MALICIOUS

PDF

49.6 KB Created: 2020-08-10 22:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2066ae846c9aff860f178a8627bb1453 SHA-1: b1f78b729277f1d8ce5a743af22a916d2ffa755d SHA-256: 60d667b281f4ab77946646e50e76716498321be6e9a4b6d23e84388649e2ea0e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to appear as a legitimate download, but the primary link redirects to a known malicious redirector. The document body and embedded links suggest a lure for users seeking design books, which then leads to malicious infrastructure. The presence of embedded URLs and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic strongly indicate a phishing or scam attempt.

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=alekhan+design+book+pdf+download
    • http://files.royalmarketingconcepts.com/uploads/1/3/1/3/131380741/997332.pdf
    • http://setarokem.onenorthfranklin.com/uploads/1/3/1/8/131856706/6755080.pdf
    • http://fibozu.chrisann-jeff.com/uploads/1/3/1/6/131606289/vurofajit.pdf
    • http://files.sruthilayaa.com/uploads/1/3/1/4/131407571/6128424.pdf
    • http://files.vbsmontecarlo.com/uploads/1/3/0/7/130739154/parow-wajuwojibapasek-lekirasugagufum-ledajifujemuf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/6472/8479/files/56162162361.pdf
    • https://cdn.shopify.com/s/files/1/0434/0993/2440/files/83327858821.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/48758444080.pdf
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/probability_tree_diagram_worksheet_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/18521742626.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/sawenowovotevegemodokeru.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/14087691334.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/5367520044.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/kipavowog.pdf
    • https://cdn.shopify.com/s/files/1/0438/6072/1829/files/tegofiro.pdf
    • https://cdn.shopify.com/s/files/1/0433/7664/0156/files/real_d_3d.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
font_00_sfnt_off00006ff8.bin
f13d624c41f09768a23ff1d639cac3909c14af9d595c760ba3cdb8f1eeb85138		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF8 5200 bytes
font_01_sfnt_off0000819c.bin
e87159a201684f07fd07530603f5c3a2aa3947a3c910f236916443120e395d1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x819C 14744 bytes
font_02_sfnt_off0000a9ee.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9EE 4324 bytes

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