Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f19dd44f4cbe74b…

MALICIOUS

PDF

41.1 KB Created: 2020-08-14 17:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30babcc0a93a4984c8209ec7058f16f3 SHA-1: 476c2b113e0472b84b9876b31e3b0e0e6eaedbfa SHA-256: 3f19dd44f4cbe74be53d061a149c647d16608b4ef99dda30490ef42f6ba6ae9f
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, ttraff.com. The document body, though heavily obfuscated, contains the same lure text and URLs found in the heuristics. The primary malicious activity observed is the redirection to a malicious site, likely for further exploitation or phishing. No scripts were extracted from this sample.

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.com/pify?keyword=bhojpuri+gana+video++movie+song
    • http://files.create-diy-online.com/uploads/1/3/1/6/131606408/gajurawagin_bodidusuk.pdf
    • http://files.wildflowercentury.org/uploads/1/3/1/0/131070722/moxede-pukikosexolu-navitilu.pdf
    • http://files.openairsessa.com/uploads/1/3/1/0/131071312/getuvotimo.pdf
    • http://womuju.uwchipsi.com/uploads/1/3/0/7/130776031/9912128.pdf
    • https://cdn.shopify.com/s/files/1/0431/5634/0890/files/34734727203.pdf
    • https://cdn.shopify.com/s/files/1/0429/1615/1455/files/99478262361.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/xewutivutesitegabasik.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/nilenatefexaxolivu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6710/3645/files/gamiwe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5262/2231/files/gugulobemejaxosubuwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0103/6443/files/ballade_pour_adeline_original_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/3493/5447/files/cdc_vaccine_information_statement.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/vikidegavudabolifexafene.pdf
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/weather_update_app_apk.pdf
    • https://cdn.shopify.com/s/files/1/0439/2986/2312/files/60388037325.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/42227416631.pdf
    • https://cdn.shopify.com/s/files/1/0437/3879/2085/files/34954469053.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/zafuzabesijonodu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051b4.bin
491a8eeccb28ae886995a0e7b921a5e4fd461a2c0a9eb75bb29f18e4cb81c6ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51B4 5528 bytes
font_01_sfnt_off0000645d.bin
475771e967f9f46e0f24e1530ff70e128d8e02bff777c4664e5cb4d6a822201f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x645D 9792 bytes
font_02_sfnt_off00008624.bin
bd10e1a245017adfe2cf821694ab6179fcdea0fd384c4315ad147d07417c4915		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8624 4640 bytes

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