Malicious PDF — malware analysis report

Static analysis result for SHA-256 f16fd8b7d0a1cde0…

MALICIOUS

PDF

48.0 KB Created: 2020-08-04 19:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c85d08f1b24a6f88b363272a15e6a91b SHA-1: c27e352591a942c44dbebf33eed4e21a7772f97b SHA-256: f16fd8b7d0a1cde0f9258fb361432ef92566d622189b0f348fe383d488b1bb14
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, many of which point to a link farm hosted on Shopify, ultimately redirecting to a malicious URL. The primary malicious URL identified is https://ttraff.cc/pify?keyword=definition+of+strategic+management+by+different+authors+pdf, which is a known malicious redirector. This indicates a phishing or content-luring attack designed to redirect users to malicious infrastructure.

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=definition+of+strategic+management+by+different+authors+pdf
    • http://files.abernathyband.com/uploads/1/3/2/6/132696214/pumanugopadidowa.pdf
    • http://files.ctechmotorsport.net/uploads/1/3/2/6/132682802/jafabulawuveza_ginugujanivori_xakikizopuku_xejaviripavug.pdf
    • http://files.markbury.com/uploads/1/3/1/8/131871871/fezafudidaw_kimetulasupuda_kajejobowi_jugamikudolitev.pdf
    • http://files.maevanaturals.com/uploads/1/3/2/8/132814241/fewojo_domixiraxatar_zunaxudutega.pdf
    • http://files.peggriffith.com/uploads/1/3/0/7/130740367/7fb79.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/40165652968.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2166/files/vajozojo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/jarewananavifetar.pdf
    • https://cdn.shopify.com/s/files/1/0428/7732/1379/files/xozomamowo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8864/2197/files/54590415716.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/69683208607.pdf
    • https://cdn.shopify.com/s/files/1/0428/2014/1223/files/40573517214.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/32371969717.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/migipo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/30293020248.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6429/files/the_pigman_test.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_off00006305.bin
b419f5735b0cd9ef090e3f589cee1c84d9c011182bb510cfee89d81f5c2222ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6305 5660 bytes
font_01_sfnt_off0000761b.bin
a75d213aa91f53742f6c2c63ee6a3ec342b07fa38b1e0de7d2848466e099130f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761B 14672 bytes
font_02_sfnt_off0000a43e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA43E 4324 bytes

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