Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c496438132e7a00…

MALICIOUS

PDF

45.0 KB Created: 2020-08-21 22:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dda4964358898fcd3430d3790ad980ec SHA-1: 40b1e813b99fd3e3e6c2a1567ee5d094e2e8ae21 SHA-256: 0c496438132e7a0025574232be49534cafb4b635236291b1d490def6323c092e
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector pointing to a lure for a 'Cafeland mod apk unlimited cash'. The presence of numerous external PDF links, many pointing to Shopify, suggests an attempt to manipulate search engine results or distribute content. The primary malicious link redirects through 'ttraff.cc', indicating a likely distribution point for malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=cafeland+mod+apk+unlimited+cash
    • http://fezezogim.cambridgesupervisiontraining.org/uploads/1/3/2/6/132681337/divef.pdf
    • http://files.simplysouthernflowers.com/uploads/1/3/0/7/130776200/bf299d240.pdf
    • http://files.fountainoflifeministrieshavelock.org/uploads/1/3/1/8/131871816/bf10e1.pdf
    • http://files.koowood.com/uploads/1/3/2/6/132696274/vugukipenova.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/2317/8656/files/approximation_by_superpositions_of_a_sigmoidal_function.pdf
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/jekafuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/1872/2207/files/67830819265.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91960476686.pdf
    • https://cdn.shopify.com/s/files/1/0465/0785/1926/files/media_player_android_chromecast.pdf
    • https://cdn.shopify.com/s/files/1/0429/2195/1391/files/23710251869.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fakuwonilojovaxibudebu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4823/files/baliwuduzewara.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/27823699246.pdf
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/lizozogojaxolejozimeforuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/symmetric_and_antisymmetric_tensors.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_off00005ef4.bin
8138019c8cfaeb3042734610996433bb13061f0725e790ece858b70a41aac6e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF4 5268 bytes
font_01_sfnt_off000070ba.bin
55c30a1ccfb8c22e48c506a3f80e1c4a56ec86ec12c68ac93eebcdce0829f04e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70BA 14976 bytes
font_02_sfnt_off00009955.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9955 4324 bytes

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