Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8209d055ce98e6f…

MALICIOUS

PDF

51.2 KB Created: 2020-08-26 16:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19a60701f888576c39760d4b57e93510 SHA-1: 754ea7497f87bcf919f2554c45f2b99a08782d69 SHA-256: c8209d055ce98e6fc9443c15dfa481720ace895ee7cd4bc570f1e5ef05524cd6
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to SEO-optimized PDF files hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=baldur%2527+s+gate+dark+alliance+2+pcsx2', is identified as a known malicious redirector. This suggests a campaign focused on driving traffic to malicious infrastructure through a link farm. No scripts were extracted, limiting further analysis of the payload.

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.ru/pify?keyword=baldur%2527+s+gate+dark+alliance+2+pcsx2
    • http://files.paragliding-in-interlaken.com/uploads/1/3/1/4/131453421/gopomulij.pdf
    • http://pijuxulev.sacredheartschoolfowler.org/uploads/1/3/2/8/132814928/022825d3a.pdf
    • http://zalosegod.mckinnonactingstudio.com/uploads/1/3/0/9/130969204/veduk-dalinisaresig-rutonus.pdf
    • http://files.garysstorage.com/uploads/1/3/0/9/130969470/livuv.pdf
    • http://bosasuvu.michiganconcretepros.com/uploads/1/3/1/6/131636954/d5ba2cc469b0.pdf
    • https://cdn.shopify.com/s/files/1/0435/4483/8303/files/23559379917.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/asuransi_kesehatan_syariah.pdf
    • https://cdn.shopify.com/s/files/1/0454/6478/0950/files/9598529898.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/xobonofutikibebiw.pdf
    • https://cdn.shopify.com/s/files/1/0436/7728/6565/files/rimugeledamuxegipelojamul.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/caplin_point_laboratories_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/0718/8898/files/sugujujudikuzorev.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/55785290156.pdf
    • https://cdn.shopify.com/s/files/1/0428/6873/6166/files/14041627744.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/33408810130.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_off00006876.bin
536ce9823a42edc9cb34cbceffa9a33e810c8814fe169d5ae361c640b7b3bf63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6876 4320 bytes
font_01_sfnt_off00007775.bin
d4a70b6e63a87fd0551f72ffd83e56f716cf2cc652d1fe1e1f6eb1c62bb2faa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7775 5360 bytes
font_02_sfnt_off000089c2.bin
84ce0bd139142c8595674698000c1be9d5d5cb200d4b85866f6b97f65ff505ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89C2 12168 bytes
font_03_sfnt_off0000b0fa.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0FA 4324 bytes

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