Malicious PDF — malware analysis report

Static analysis result for SHA-256 aefc2df89871e72c…

MALICIOUS

PDF

43.9 KB Created: 2020-08-27 14:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b4100857d42cac2274d78425ea074ed SHA-1: 67a66cc0721f3e7eaae85b7097e773a8f57322b6 SHA-256: aefc2df89871e72cf5be183ee68cbf5b2407f3a6eab83a9a9c231c6e4b7e6a9b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, many of which point to external resources, including a known malicious redirector. The document body, though partially corrupted, suggests a lure related to a 'free printable invoice template'. The primary malicious link identified is 'https://ttraff.link/pify?keyword=maksuton+tulostettava+laskutuspohja', which likely leads to further malicious content. The presence of a link farm and a malicious redirector indicates a phishing or scam attempt.

Heuristics 3

  • 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.
  • 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.link/pify?keyword=maksuton+tulostettava+laskutuspohja
    • http://ziwedomo.forbiddenflaverz.com/uploads/1/3/1/3/131398244/8973608.pdf
    • http://lupeb.daydreamscakecompany.com/uploads/1/3/0/9/130969153/3202823.pdf
    • http://files.northlittletonpromise.org/uploads/1/3/2/6/132682974/9290007.pdf
    • https://cdn.shopify.com/s/files/1/0446/4685/8915/files/automata_theory_languages_and_computation_hopcroft.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97046042130.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/tumitulakimuvomalorab.pdf
    • https://cdn.shopify.com/s/files/1/0434/0714/7166/files/direpaxipepisog.pdf
    • https://cdn.shopify.com/s/files/1/0430/9290/2039/files/58896212719.pdf
    • https://cdn.shopify.com/s/files/1/0431/8792/9245/files/characters_not_allowed_in_filenames.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/the_world_s_end_123movies.pdf
    • https://cdn.shopify.com/s/files/1/0461/7542/0579/files/18754191840.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5349/files/gamolagu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/97440938811.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3077/files/ca_course_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/catalogue_ph_kin_hafele.pdf
    • https://cdn.shopify.com/s/files/1/0433/7297/0133/files/52408553586.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069d3.bin
2b3b00107e23b1e97d36eba7682181361721944cb0f9fef6faf26636a0c3786c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D3 5016 bytes
font_01_sfnt_off00007af5.bin
b24a56577c2135c2a064bab8b351f0b7ba671edc8769435e6358bd26efbf2c43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF5 11552 bytes

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