Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08d548528214a0a…

MALICIOUS

PDF

45.6 KB Created: 2020-08-12 05:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24fcf0cc38146104ec799a95c17f0fae SHA-1: c79360f2e91462b5a08e9159771a75d9203ad871 SHA-256: d08d548528214a0ab573340b4289e359910b6ddfce5a444124dd7d3dabafb611
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'invoice' and 'important english words', aligning with the 'SE_INVOICE_LURE' heuristic. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploitation.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=important+english+words+used+in+daily+life+pdf
    • http://files.rachelskaufman.com/uploads/1/3/0/9/130969592/8395329.pdf
    • http://files.dogfriendlyrentalsonsanibel.com/uploads/1/3/1/3/131383358/zaresedup_gijade_totikokab_mibezebodex.pdf
    • http://files.nick-paul-dive.com/uploads/1/3/0/8/130873923/3243546.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/la_campanella_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdf
    • https://cdn.shopify.com/s/files/1/0429/0491/2031/files/24557833532.pdf
    • https://cdn.shopify.com/s/files/1/0429/2621/1238/files/budizaxa.pdf
    • https://cdn.shopify.com/s/files/1/0438/1927/0306/files/mutujoganavabi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/73356598401.pdf
    • https://cdn.shopify.com/s/files/1/0434/4381/4556/files/likif.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/52578586458.pdf
    • https://cdn.shopify.com/s/files/1/0429/2358/9788/files/emergency_action_plan_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0439/4074/1275/files/90732072269.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0245/files/ncert_class_10_english_literature_reader_book_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007247.bin
7d5ef7c8efe77af11cccc6d20752504e9e48eb0de1978e639e3973f88bd38c1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7247 5588 bytes
font_01_sfnt_off00008523.bin
efeb64b8d902d5d59c2360a4366addfe54d0cedaf550dfd7cfb4c61d0402da16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8523 10472 bytes

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