Malicious PDF — malware analysis report

Static analysis result for SHA-256 151a6bc6d8529df0…

MALICIOUS

PDF

45.4 KB Created: 2020-08-31 15:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1fb6c9ecae027d49bcfef41ef4edb29 SHA-1: 96483a112cc4d0a9b69db9426aa9570286599fd8 SHA-256: 151a6bc6d8529df0412cd45ca1b2e85b5079874c060ea79833547d067a6c1607
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying it as a PDF link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=fusion+360++linux', which is likely used to redirect users to further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into visiting malicious sites, potentially for phishing or malware distribution.

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.ru/pify?keyword=fusion+360++linux
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/project_approval_letter.pdf
    • https://cdn.shopify.com/s/files/1/0439/4647/5675/files/el_noi_de_la_mare_tab.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/fefobetofusowuwixet.pdf
    • https://cdn.shopify.com/s/files/1/0432/9046/0324/files/patterns_and_sequences_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/6667/8696/files/guribepikubasamewuj.pdf
    • https://cdn.shopify.com/s/files/1/0438/6055/7984/files/77566681921.pdf
    • https://cdn.shopify.com/s/files/1/0452/4752/9117/files/cariotipo_47_xyy.pdf
    • https://cdn.shopify.com/s/files/1/0431/6446/7357/files/binenuwi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/69563185685.pdf
    • https://cdn.shopify.com/s/files/1/0438/6439/1845/files/gubobosoripoxurexuna.pdf
    • https://cdn.shopify.com/s/files/1/0461/9721/1294/files/alcatel_one_touch_5020a_se_queda_en_el_logo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3059/2160/files/tovegisuvinanemifesotivaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6641/7567/files/types_of_enzyme_inhibition_with_examples.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_off00005dc3.bin
9440f71eefa4f59c7a71b16fb0b9f65724f2db68f71ee41650680a98f027c4b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC3 4032 bytes
font_01_sfnt_off00006c34.bin
954600b285bec7698ea9cd2d483a9fe4b781b2b24bc23455bc848a34959a839c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C34 4856 bytes
font_02_sfnt_off00007cd8.bin
2c91cb4e42512f06ea4430f1682a4f93f8ef6246d5d2cb284def1b30c1197a87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD8 13988 bytes

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