Malicious PDF — malware analysis report

Static analysis result for SHA-256 78310bba912a4d2a…

MALICIOUS

PDF

39.7 KB Created: 2020-08-02 16:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaf43f468ba67bc05cf0f54d25441070 SHA-1: d8104f2739d7aa3df12b6130221096885979ef7a SHA-256: 78310bba912a4d2a1c2fdf7a46168551d9d96f763be0d4acdbf40d1c73ff7de5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a link farm or SEO manipulation tactic, embedding numerous external links. One prominent URL, 'https://ttraff.com/pify?keyword=python+static+variable', is identified as a malicious redirector. The document's structure and the sheer volume of links suggest an attempt to artificially inflate search engine rankings or distribute traffic to potentially harmful sites, rather than delivering a direct payload.

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.com/pify?keyword=python+static+variable
    • http://files.petcremationcare.ca/uploads/1/3/0/7/130775431/famamaropomizid.pdf
    • http://files.harrisburgtroyhistoricalsociety.org/uploads/1/3/0/8/130814586/6335174.pdf
    • http://files.wildsurvivalskills.com/uploads/1/3/1/3/131380158/7a9bed2b4780f.pdf
    • http://files.grandvilleayso.org/uploads/1/3/2/7/132740716/sibomupuzoxozej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2132/0870/files/51570031850.pdf
    • https://cdn.shopify.com/s/files/1/0434/7330/5762/files/71616388091.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0099/files/87004959536.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/raspberry_pi_auto_mount_usb_drive.pdf
    • https://cdn.shopify.com/s/files/1/0428/4694/5436/files/rugowasop.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/20324693678.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/54735764503.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/damegadunuje.pdf
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/61644448132.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/sukidugalof.pdf
    • https://cdn.shopify.com/s/files/1/0430/7206/1591/files/92660297216.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_off00005c4c.bin
f323a171a17099ae68bdbcef2c31a7e6c7b6ac70a6af43185fdc561cde04d809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4C 5188 bytes
font_01_sfnt_off00006dfc.bin
90d4a5d3467c26a53d937c2af7e5666dd9e6a8f9d1177ee39f598ba1270f08f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFC 10656 bytes

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