Malicious PDF — malware analysis report

Static analysis result for SHA-256 38cc14b1b857aae3…

MALICIOUS

PDF

49.2 KB Created: 2020-08-02 22:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44481ef51aec5be4ae00954fc4d02378 SHA-1: 5036d8a38c3b864b3d18ea12ec19f042e1f8391e SHA-256: 38cc14b1b857aae32ec0b68e9754142a3acc9d0f775dbb1c4d533b1bb4b8612e
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a primary link to a redirector at 'ttraff.ru' disguised as an 'Intex pool manual'. This suggests a link farm or phishing attempt designed to drive traffic to malicious infrastructure. The document body itself is heavily obfuscated and contains binary data, but the embedded URLs are the primary indicators of malicious intent.

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=intex+pool+manual
    • http://files.warrenplainsbaptist.org/uploads/1/3/0/7/130738562/bupetikivovenes_taxajo_nixojo_pazopime.pdf
    • http://files.abundantbehavioralhealth.net/uploads/1/3/0/8/130813923/dobotij_tarunazapexafu_sakunumun.pdf
    • http://files.mountpleasantsaundersfoot.com/uploads/1/3/1/4/131483361/werifug_sawokafu_duworize_guveku.pdf
    • http://files.joannasholistictreatmentclinic.com/uploads/1/3/1/1/131163914/tazigusod_tavumudarofap_maruvejeri.pdf
    • http://files.4mustain.com/uploads/1/3/1/3/131381706/3411411.pdf
    • https://cdn.shopify.com/s/files/1/0429/1103/9655/files/76492954420.pdf
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/7254859395.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/23135117934.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/13946196244.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/xubebuwi.pdf
    • https://cdn.shopify.com/s/files/1/0440/0958/6846/files/19472954332.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/linevuluwikevogi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4368/4503/files/zajabilozifurigekabex.pdf
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/lowix.pdf
    • https://cdn.shopify.com/s/files/1/0429/7755/8681/files/mupixaxet.pdf
    • https://cdn.shopify.com/s/files/1/0433/4724/7263/files/kukoxedezufakuxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3374/7878/files/guardian_tokens_borderlands_3.pdf
    • https://cdn.shopify.com/s/files/1/0432/8787/1646/files/26980223902.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006794.bin
a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6794 6440 bytes
font_01_sfnt_off00007757.bin
adf32003828e0940dd70a9ab198bdbf787bfce6d516b45b646911e816e1ab742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7757 2888 bytes
font_02_sfnt_off0000819f.bin
b788a74ed336cb721dbd1dc69a21cad5cdd0fa25d980dfb7d01d60e758ffba14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x819F 4696 bytes
font_03_sfnt_off00009189.bin
da67cf39c8e6906fe726ff768450ffdcc2aa72ceeb7bb577f44716ff26090595		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9189 10976 bytes

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