Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dda9fd6a596f69e…

MALICIOUS

PDF

33.5 KB Created: 2020-08-16 12:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82a84a464f729d9d3bdcf64aa7248a2c SHA-1: 06fe2686c36c35c925ffc9558fbb5fb0bc45f602 SHA-256: 5dda9fd6a596f69e138573b73750e518cf1a16d2e6f0460d072e6e004af3f534
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically the URL https://ttraff.ru/pify?keyword=bostitch+air+staple+gun+manual. This indicates an attempt to lure the user to a malicious site, likely for phishing or malware distribution. The presence of numerous external PDF links also suggests a link farm or SEO manipulation tactic. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=bostitch+air+staple+gun+manual
    • http://files.hattology.com/uploads/1/3/2/6/132681356/1497693.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/7025/7320/files/57504913644.pdf
    • https://cdn.shopify.com/s/files/1/0430/7746/8327/files/59637902597.pdf
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/zuradofof.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/80776207422.pdf
    • https://cdn.shopify.com/s/files/1/0431/3913/7702/files/xuverevupokojopaxunixize.pdf
    • https://cdn.shopify.com/s/files/1/0431/5060/6496/files/priority_pass_lounge_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/alaipayuthey_movie_songs_isaimini.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/1557948354.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6396/files/78587594144.pdf
    • https://cdn.shopify.com/s/files/1/0430/9513/0266/files/jemogaparotiwidog.pdf
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/14799609865.pdf
    • https://cdn.shopify.com/s/files/1/0428/6572/1503/files/3387642545.pdf
    • https://cdn.shopify.com/s/files/1/0429/3092/9827/files/88103114179.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_off0000455f.bin
6aed333a59261c91dd5182ea83b24759757613643d65038ad9ff5b1429b29529
pdf-font-stream PDF embedded font (sfnt) at offset 0x455F 5396 bytes
font_01_sfnt_off0000578f.bin
9d2120c14bc36279cd7f10d6f512cd8382e668bb218f3df84cc41efd927b0e03
pdf-font-stream PDF embedded font (sfnt) at offset 0x578F 9836 bytes