Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8584bb7a4da80d…

MALICIOUS

PDF

42.2 KB Created: 2020-08-17 17:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8d2a2b69ee533f618154ba0338ccc15 SHA-1: 8988e97235405e298a8b0ba772256a8e140c936a SHA-256: de8584bb7a4da80dcf532f3429d38a0622e0a4355b03f532b1a027cd67b92d12
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for 'live wallpaper android dragon ball z', and the embedded URL points to this same lure. The PDF_SEO_LINK_FARM heuristic also indicates a large number of embedded links, suggesting a link farm or distribution mechanism.

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.ru/pify?keyword=live+wallpaper+android+dragon+ball+z
    • http://files.sandrapaolalopez.com/uploads/1/3/0/8/130813988/2511042.pdf
    • http://files.sofiaelghazzali.com/uploads/1/3/0/7/130738534/dulefanamamurep.pdf
    • http://files.uhighmusic.com/uploads/1/3/1/0/131069763/4173802.pdf
    • https://cdn.shopify.com/s/files/1/0434/9090/2166/files/42369013959.pdf
    • https://cdn.shopify.com/s/files/1/0430/8123/6634/files/zudimebugasabotex.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/simple_company_profile_sample.pdf
    • https://cdn.shopify.com/s/files/1/0433/6582/6719/files/1972625755.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5675/files/luxoti.pdf
    • https://cdn.shopify.com/s/files/1/0435/6964/3675/files/till_it_happens_to_you_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0438/1330/6530/files/backcountry_magazine_gear_guide_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/2093/3528/files/number_theory_book_by_burton.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/64949986339.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/lozireje.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7936/files/93876435410.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_off00005c21.bin
ac0559e2d9a6811c2f8d7394341a1119a6717ca8eda73ddee11cca83e953f693		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C21 3056 bytes
font_01_sfnt_off00006707.bin
dde45a9da841f494c4e8a1ff9e0b3b930d694621a88bf89865b61a3af6ab302b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6707 5232 bytes
font_02_sfnt_off00007901.bin
f2568f8a6aa532ded099ef570dcf963091147c4020d8a1f169efb65decca26e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7901 9920 bytes

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