Malicious PDF — malware analysis report

Static analysis result for SHA-256 08138d7c382a4fe9…

MALICIOUS

PDF

65.8 KB Created: 2020-08-23 17:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a55320d7114a7c988602fade0c4b6a0d SHA-1: a15f379e3f3df5ae5068c2be60bf05866f23b070 SHA-256: 08138d7c382a4fe91283342d205e6da0fa1f494ec9b2cf3cbdeed8e53664b3a5
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=le+catalyseur+automobile+pdf'. This suggests a phishing or scam attempt, likely using the document as a lure to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=le+catalyseur+automobile+pdf
    • http://wixexe.trupbsc.ca/uploads/1/3/1/0/131069869/4468639.pdf
    • http://files.hansmatheson.org/uploads/1/3/1/6/131637374/9f067b.pdf
    • http://godejefik.cookingonthetruck.com/uploads/1/3/1/3/131383548/xexekoporivediv.pdf
    • http://nedafa.fairwindstables.com/uploads/1/3/1/3/131398428/b85bc19.pdf
    • http://files.nicoleolsthoorn.com/uploads/1/3/1/1/131163856/jabisovij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/4063/5042/files/cub_cadet_lt1045.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/duzaguponopixabekizifawov.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/83371976160.pdf
    • https://cdn.shopify.com/s/files/1/0430/8992/0154/files/harvest_moon_movie_cast.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6845/files/peptic_ulcer_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27055139941.pdf
    • https://cdn.shopify.com/s/files/1/0433/3348/4702/files/shin_chan_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/9102025027.pdf
    • https://cdn.shopify.com/s/files/1/0430/0741/0329/files/42643099748.pdf
    • https://cdn.shopify.com/s/files/1/0434/1510/9797/files/22150358557.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_off0000afd7.bin
eaa0b73f2711343aca4fb462d2f91f25af48541cef5b312aac4d1389aa6f1436		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD7 5260 bytes
font_01_sfnt_off0000c1ba.bin
dcd0789b7228221c3a06cec38a0daa602efae3e30fa4ee3bb930036588790b91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1BA 12884 bytes
font_02_sfnt_off0000ea42.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA42 4324 bytes

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