Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63c12b5a4a32360…

MALICIOUS

PDF

47.8 KB Created: 2020-09-01 11:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4ef8d037feb1202737d74437f4f2256 SHA-1: e4cbaadd05f7d8f99e155bd10127be995383c628 SHA-256: d63c12b5a4a323602b5982b1828908f04ff8b35449b2c277237ebe46d3548a98
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a search result for a video. The document also hosts a large number of other PDF files on Shopify and static.usrfiles.com, suggesting a link farm for SEO poisoning. No scripts were extracted, but the presence of the malicious redirector and the link farm indicates a phishing or malware distribution attempt.

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.cc/wix?keyword=payaliya+bajni+lado+piya+video++pagalworld
    • https://cdn.shopify.com/s/files/1/0433/8332/4822/files/numerical_linear_algebra_trefethen_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/anniversary_update_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/97620280479.pdf
    • https://cdn.shopify.com/s/files/1/0430/6403/3429/files/1110331121.pdf
    • https://cdn.shopify.com/s/files/1/0436/3704/7449/files/cashless_policy_and_economic_growth_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0435/2363/7402/files/bandpass_apk_uptodown.pdf
    • https://static.usrfiles.com/ugd/99a8f2_8dba8592fb87474983b9fabcd8a32d1d.pdf
    • https://static.usrfiles.com/ugd/c0fca2_7ab62fd6c3f5420cacf748aca758b24d.pdf
    • https://static.usrfiles.com/ugd/4b874d_3e88917b2b7344fb8ddd6fd9c2246dc5.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_41a28fc592de453dadda4ff11145ae1c.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecdd369a514c4b62820ed775c77ba857.pdf
    • https://static.usrfiles.com/ugd/b8c837_abcc28a4d8af49968202b82dd3743905.pdf
    • https://static.usrfiles.com/ugd/b8c837_80b834759d2c4e9b943af6c63b8f4b64.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_off00004804.bin
b0a54a907d17792875287808156e0bd0cf302e18dc1bdf4158fddd61ff85bf92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4804 5420 bytes
font_01_sfnt_off00005a9a.bin
aee31ea8bbd521cabf54d2675fca0b025307740f3311be2716afab88b786f735		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9A 9956 bytes
font_02_sfnt_off00007cf8.bin
7d9c00ecf4a1cf56a888d607caf9ab72c7d744c3c3dea724f429ecd98dc58178		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF8 18316 bytes
font_03_sfnt_off00009961.bin
f190edd4137dd4207a48bcdd1b2f4430732708b3bb4b6d4edb29a83b7ad5ebd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9961 6116 bytes

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