Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9bc0ed96d196693…

MALICIOUS

PDF

69.4 KB Created: 2020-08-05 06:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5155f086b410ee9ce4659f728a48d41 SHA-1: 72a868b30fdfc73bd61d61f527d683122190be97 SHA-256: e9bc0ed96d196693876ddc0e7caf8e19ce638af805433152edb4ba8fb557ec6c
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 external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=what+is+righteousness+according+to+the+bible+pdf'. The document body, though partially corrupted, contains text related to biblical righteousness and the wkhtmltopdf tool, suggesting a lure to disguise the malicious link farm. The ML classifier also strongly indicated maliciousness.

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=what+is+righteousness+according+to+the+bible+pdf
    • http://files.seafieldfarmva.com/uploads/1/3/0/7/130775997/jalukopagavikub-sasegejebeto-wanupimojudux.pdf
    • http://files.beyondprocess.com/uploads/1/3/1/3/131382430/a8a36d3a95a612.pdf
    • http://files.summitorthosports.com/uploads/1/3/1/3/131398250/05e5a.pdf
    • http://files.imptravel.co.uk/uploads/1/3/0/7/130775856/ladabatopusilizo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8686/3783/files/repojagosigeloboxo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4134/7994/files/77553466236.pdf
    • https://cdn.shopify.com/s/files/1/0435/0948/1624/files/46913088142.pdf
    • https://cdn.shopify.com/s/files/1/0437/9816/7713/files/62278552131.pdf
    • https://cdn.shopify.com/s/files/1/0434/8428/3033/files/vovoludavelamunupisimexu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/77247103286.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/kuvajilasusesonile.pdf
    • https://cdn.shopify.com/s/files/1/0449/7784/8488/files/britten_war_requiem.pdf
    • https://cdn.shopify.com/s/files/1/0433/6372/9557/files/jekux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26450283228.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/zufenisekawov.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000095b4.bin
74b630851425e27c670cccf55f1c3a12cb436667bb4915ac725f1741e0bceffc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95B4 3488 bytes
font_01_sfnt_off0000a237.bin
1039917f1efd429b4754452baa3f5eeab136d2a6bb00a4f6c1f6d96a2c99b25c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA237 5568 bytes
font_02_sfnt_off0000b523.bin
a257587248d5a55225b7c25cbbf73201ada355aaacff1a00bd9a39c5c1d17390		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB523 3540 bytes
font_03_sfnt_off0000c2da.bin
3546d86c5c427ead9c7cc85c011800b7e1535cbbfdf258436ab817fe7d775246		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DA 2320 bytes
font_04_sfnt_off0000cd0b.bin
30d21316902657ef45b2084a54dfb1425289ebc2b86a2e50a6533e5195c11b78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0B 14600 bytes
font_05_sfnt_off0000faea.bin
98eeb827bb0f35dd6c20a581ebc7714944eed58df4b4779df2b4efea0589abc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEA 2992 bytes

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