Malicious PDF — malware analysis report

Static analysis result for SHA-256 6177020d9ea25862…

MALICIOUS

PDF

52.6 KB Created: 2020-08-25 21:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46034b354d0109c42e0b3f9a95562abe SHA-1: a042a6e3b8035e2d1f94a50041faa38df2632ef5 SHA-256: 6177020d9ea258626785634291af14f564e4bf5a49af29298e90df2fcffee49c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link disguised as a government salary calculator, which redirects to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the ML classifier also flagged the document as malicious. The document body contains the same lure text and the malicious URL, indicating a phishing 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.cc/pify?keyword=wb+govt+6th+pay+commission+salary+calculator
    • http://kaxajed.ogdenroofers.com/uploads/1/3/0/7/130738697/delujifakugipo.pdf
    • http://files.maddartphotography.com/uploads/1/3/0/9/130969220/9c40fc424441.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesulemenakasisot.pdf
    • https://cdn.shopify.com/s/files/1/0431/0168/3865/files/naxelewusafasojipaxilo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/cursive_alphabet_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0440/1417/4358/files/coleman_rv_air_conditioners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/sufemujuja.pdf
    • https://cdn.shopify.com/s/files/1/0436/0414/8381/files/birthday_cake_emoji.pdf
    • https://cdn.shopify.com/s/files/1/0465/4576/4510/files/jesijewilakusodaraxuteran.pdf
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/xorogovobexuvefikotol.pdf
    • https://cdn.shopify.com/s/files/1/0429/2755/4723/files/tudogulalerako.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000693f.bin
e6cd13942b73d78ee1b903085868d7db9e4f3655a1d8667f5aa203aab4b0d064
pdf-font-stream PDF embedded font (sfnt) at offset 0x693F 5816 bytes
font_01_sfnt_off00007cf9.bin
d6747162b1ca51cb358220236f2f170d848572c77e1f8321f7d1153ee301a12f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF9 10868 bytes
font_02_sfnt_off00009e91.bin
b9b66d9ddd7d6a9a2287cfa3fd36c85107e30762e141d8791925e779d953b994
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E91 10464 bytes