Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ba1a77650bb6f2…

MALICIOUS

PDF

40.1 KB Created: 2020-08-10 09:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7cfa9300b9570c6d5103efc91cd13ec SHA-1: 7007814d66b3435b60124e199560e0926937afb2 SHA-256: 24ba1a77650bb6f214781e1d8c752f18cc5bf902e2df9f6cdb114c244a58da03
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a high number of embedded links, many of which point to benign Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a social engineering attempt to lure users into clicking a malicious link under the guise of providing PDF documents. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=materiales+odontologicos+pdf
    • http://files.ballroommagicdancecenter.com/uploads/1/3/0/7/130775292/dbd0888f84c03.pdf
    • http://files.asfi2020.com/uploads/1/3/1/4/131453455/tixixim_vumibif_malisisobes.pdf
    • http://xolimaxid.managingupset.com/uploads/1/3/1/0/131070450/9880182.pdf
    • http://files.traceypartridgeart.com/uploads/1/3/1/4/131483249/2194420.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/dapoziwomaxiwajojegela.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7863/files/hp_prime_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/22325114937.pdf
    • https://cdn.shopify.com/s/files/1/0439/4500/1115/files/malory_towers.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/windows_98_second_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/7244/5846/files/8060042934.pdf
    • https://cdn.shopify.com/s/files/1/0431/8075/3058/files/adobe_photoshop_cc_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/7184/0161/files/pons_sownik_obrazkowy_angielski.pdf
    • https://cdn.shopify.com/s/files/1/0431/0790/9794/files/synchronized_cardioversion.pdf
    • https://cdn.shopify.com/s/files/1/0428/6038/0327/files/26885105466.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/pajimelozepenobanadoged.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/89546214706.pdf
    • https://cdn.shopify.com/s/files/1/0437/3620/3415/files/tozupukudewumezepex.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_off00005fb1.bin
a4a2e80d5ed80e17efbf98b54053f0880e837592da8fa729d20431408a9eb133		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB1 5328 bytes
font_01_sfnt_off000071f1.bin
d8fab11eface5792104b0ad3ee19b14739c3b6dc6df7a113f791be3c541c320f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F1 9912 bytes

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