Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04b627a675f48ef…

MALICIOUS

PDF

44.8 KB Created: 2020-08-10 11:39:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c698c2c0aa19d68a07c26f3ec1cb7158 SHA-1: 6485b5bcd1c938df8edb036c82e4b77897388440 SHA-256: d04b627a675f48efaf21d2760ebbd68895660e0758dd867f4e50549a953a2b6f
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains numerous embedded links. A critical heuristic identified a link to a known malicious redirector, and another critical heuristic detected a link farm with 18 PDF links, many hosted on Shopify. The document body, though partially corrupted, contains the URL 'https://ttraff.cc/pify?keyword=how+to+be+a+good+leader+and+manager+pdf', which is likely intended to lure users into clicking through to malicious content.

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/pify?keyword=how+to+be+a+good+leader+and+manager+pdf
    • http://files.charpentierteam.com/uploads/1/3/2/6/132696112/sopatul_xisugojerijot_fafibogupizo.pdf
    • http://files.ops-copiers.com/uploads/1/3/1/1/131164424/f7d901a685fa2.pdf
    • http://files.coupadvantageportal.com/uploads/1/3/2/7/132740463/bitipema.pdf
    • http://files.agorapodcasts.com/uploads/1/3/1/4/131407102/gofofenokutilukifob.pdf
    • http://files.strikesforkidsseattle.com/uploads/1/3/0/7/130739146/gezebaxezuxaka_jurezemabobaja_kogaba_legikilon.pdf
    • https://cdn.shopify.com/s/files/1/0431/0627/1394/files/ganapati_atharvashirsha_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0015/1707/files/71497767203.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99781003244.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/trailer_life_towing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/7950/6847/files/tp_link_archer_c2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4413/4294/files/camminiamo_sulla_strada_spartito.pdf
    • https://cdn.shopify.com/s/files/1/0437/2063/8632/files/45306812783.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1726/files/tilalojavomixifagosudili.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/carrom_rules_and_regulations.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92904811518.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/65051914628.pdf
    • https://cdn.shopify.com/s/files/1/0437/8873/0525/files/mijegomomezobitedewef.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/english_phonetic_symbols_with_examples.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/
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/english_phonetic_symbols_with_

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072c4.bin
02ad02c200f2d50e2ad7db645f8a3c9e26a82b3560037dca1ac8b0d001706b40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C4 5376 bytes
font_01_sfnt_off00008503.bin
3860a9d098712d7755f41a963c470f841346ec63e0ee3bd273a00d61b81bbfd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8503 9684 bytes

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