Malicious PDF — malware analysis report

Static analysis result for SHA-256 0948e0de8e9eb713…

MALICIOUS

PDF

45.2 KB Created: 2020-08-08 21:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7ec4fcf7e37ce035ffbfe365ceccbcc SHA-1: a5a2953cc1d6609ac06189671bbb45ebb37b5fee SHA-256: 0948e0de8e9eb713f8b6f48977772f57bbae580f2a4e89dac44d33e0d5f853e9
214 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.cc', suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, contains text related to a book title and the malicious URL, reinforcing the lure. The presence of multiple external PDF links, many pointing to Shopify domains, indicates a link farm used to obscure the true malicious destination. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=the+blue+book+of+grammar+and+punctuation+10th+edition+pdf
    • http://files.gimmeshelterofsmithfield.com/uploads/1/3/0/9/130969580/29a7060.pdf
    • http://files.rietakeda.com/uploads/1/3/2/6/132695829/6656b0.pdf
    • http://files.epistemologyontologyfoundationinstitute.org/uploads/1/3/1/6/131637631/pevomalix_bosovofuso_morif.pdf
    • http://files.ashma.studio/uploads/1/3/1/4/131408027/gosaveju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6498/2693/files/rowoberexodub.pdf
    • https://cdn.shopify.com/s/files/1/0436/0408/2851/files/58468434238.pdf
    • https://cdn.shopify.com/s/files/1/0430/3103/6053/files/39861231225.pdf
    • https://cdn.shopify.com/s/files/1/0437/6074/6648/files/pekasajezeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/chronic_liver_parenchymal_disease.pdf
    • https://cdn.shopify.com/s/files/1/0431/6479/5044/files/risaxodu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7927/7467/files/tumetufefufobinelawolibup.pdf
    • https://cdn.shopify.com/s/files/1/0431/6125/6096/files/74156118810.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1567/files/wuponawoxoworovokivizux.pdf
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/dilejak.pdf
    • https://cdn.shopify.com/s/files/1/0432/5025/3992/files/25071164066.pdf
    • https://cdn.shopify.com/s/files/1/0428/2449/9367/files/peniwoxomogetadol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0437/3613/7882/files/ligikesejotudelizulizu.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_off00006c78.bin
35af33181aed6a504195d9efcad62e2a1b83d385864e04e40a1b55a9ca64f71a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C78 5740 bytes
font_01_sfnt_off00007fdd.bin
0175aad1df4d65d8d1a28b7c98752d6de95421b033416b9ec8a63e1098395390		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDD 10908 bytes

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