Malicious PDF — malware analysis report

Static analysis result for SHA-256 b49bd48e2195590e…

MALICIOUS

PDF

51.9 KB Created: 2020-08-11 14:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf095fbc5727e53f985b0746b305ba1b SHA-1: 28625cb25491b40415bf57a69301cbf3dfef6b6e SHA-256: b49bd48e2195590ef3a2521eb92391d15dd97680d480070ce5628acfa7f4c781
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'cdn.shopify.com'. The document body itself contains the malicious URL, suggesting an attempt to lure users into clicking it. 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.com/pify?keyword=simplified+occupational+hygiene+risk+management+strategies+pdf
    • http://files.miamibluebullies.com/uploads/1/3/1/4/131409761/rurevabuxom-bipuwunoso-wexovax-difulu.pdf
    • http://files.jimabeler.com/uploads/1/3/1/4/131453171/tejujivavaret.pdf
    • http://files.10thgvi.org/uploads/1/3/1/4/131438003/3dd3958c.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/75868269602.pdf
    • https://cdn.shopify.com/s/files/1/0432/4127/5547/files/45852023405.pdf
    • https://cdn.shopify.com/s/files/1/0428/3750/8252/files/focus._ariana_grande_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/41936141003.pdf
    • https://cdn.shopify.com/s/files/1/0437/7948/9946/files/java_radix_sort.pdf
    • https://cdn.shopify.com/s/files/1/0437/0661/3912/files/nosoruke.pdf
    • https://cdn.shopify.com/s/files/1/0436/3547/4590/files/89284040098.pdf
    • https://cdn.shopify.com/s/files/1/0434/7484/5858/files/arapa_e_anlaml_kelimeler.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/69041388389.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.pdf
    • https://cdn.shopify.com/s/files/1/0434/4273/3208/files/peganekagavepipaxokuxur.pdf
    • https://cdn.shopify.com/s/files/1/0430/8992/0154/files/adoration_prayer_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7907/files/82294481807.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cbe.bin
a9a6407316293f8be439f602495e05ce72a13dd4d2b9ef9ddac06a5edfa70db5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBE 5720 bytes
font_01_sfnt_off00008ffe.bin
a236a63d981814ffde4d17aa1b356a4d7ff8be943f408137012313eda50fc537		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFE 10660 bytes
font_02_sfnt_off0000b379.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB379 4324 bytes

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