Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd4809943a32f61…

MALICIOUS

PDF

58.8 KB Created: 2020-08-14 11:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 904d13910716a0af6c5c4ed8b522c494 SHA-1: ded1edfdc99ee1999ed1374546fc988699d681a6 SHA-256: 0bd4809943a32f61e6abb4f40301743b67b3af88f690cfd322ef08b8bf1a5c15
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is likely used to obscure the final malicious destination. The document body, though partially corrupted, contains keywords related to government schemes, indicating a lure to encourage users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wb?keyword=uttar%20pradesh%20government%20schemes%20pdf
    • http://pijusimo.kenmaremindfulnessandyoga.com/uploads/1/3/2/6/132681763/koximudiwe_tovafup_jozidubexasise.pdf
    • http://rofotovu.tukawaysleddogkennel.com/uploads/1/3/1/4/131408899/rajetilovosisodo.pdf
    • http://files.nokiddingbaltimore.org/uploads/1/3/1/8/131871553/kitejofuloz.pdf
    • http://files.openheartstudio.org/uploads/1/3/1/6/131606493/pekunavatumivev.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/67823735524.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4872/files/530667714.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/vinemupelosasisuxa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5640/5411/files/alteraciones_acido_base.pdf
    • https://cdn.shopify.com/s/files/1/0435/5840/4245/files/coca_cola_philippines_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/73312757912.pdf
    • https://cdn.shopify.com/s/files/1/0434/8434/8569/files/happy_birthday_piano_sheet_music_in_g.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/33510144455.pdf
    • https://cdn.shopify.com/s/files/1/0435/6256/5795/files/55233388342.pdf
    • https://cdn.shopify.com/s/files/1/0431/0443/6390/files/5172563351.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/toduwodokudunipokoben.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/51734461338.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/
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000bfbb.bin
459f03909aac13c5f898c2076c2886bc2017148ae76950e8f7f8734825e19677		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBFBB 9076 bytes
font_00_sfnt_off0000717c.bin
6ee91ee94817e13fed2b4ee502e8d61387c81f15c24ad825d1c829db0499669f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x717C 5588 bytes
font_01_sfnt_off00008457.bin
d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8457 3720 bytes
font_02_sfnt_off00008fba.bin
b4bb182e818679057998a98ea41685bdc72c36e204cb4efdab539f6b7bad9d83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBA 15512 bytes

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