Malicious PDF — malware analysis report

Static analysis result for SHA-256 575e8d344f2bdf68…

MALICIOUS

PDF

41.0 KB Created: 2020-08-10 13:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a05cb1663578a91106beb566d7c1cd8 SHA-1: 728d1f17f07480e67cacbe4afae95b139cfb8212 SHA-256: 575e8d344f2bdf680ae630e8c0e42b8b5b32d8b6f6eb2657dea2d8695ed0e61c
152 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to appear as search results for educational materials, specifically 'Soal dan pembahasan osn biologi sma pdf'. The primary URL, https://ttraff.com/pify?keyword=soal+dan+pembahasan+osn+biologi+sma+pdf, is identified as a malicious redirector. This suggests the document's purpose is to lure users into clicking malicious links, likely leading to further compromise. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or redirection attack.

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=soal+dan+pembahasan+osn+biologi+sma+pdf
    • http://files.thebreathcontrolcoach.com/uploads/1/3/1/4/131437012/4c2fa47faf2.pdf
    • http://files.joshhayeswriter.com/uploads/1/3/1/4/131483955/kakukepewof.pdf
    • http://files.bettysmusic.com/uploads/1/3/1/6/131606127/gigiwogaragiweb.pdf
    • http://files.freedombaptistasheville.org/uploads/1/3/1/0/131069897/dufexagexu.pdf
    • http://files.historianchris.com/uploads/1/3/2/7/132710797/rewezifuva-tusakenodexedod-bonasaguxate-wotiwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7901/files/general_biology_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/2622851625.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5236/files/gojenefawajiromade.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/gevunototera.pdf
    • https://cdn.shopify.com/s/files/1/0440/1122/5246/files/weganobetalumoxiduxer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdf
    • https://cdn.shopify.com/s/files/1/0437/5396/3678/files/game_of_thrones_online_legendado.pdf
    • https://cdn.shopify.com/s/files/1/0436/0319/8115/files/72193755328.pdf
    • https://cdn.shopify.com/s/files/1/0437/0238/6856/files/java_collections_big_o_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/6251/8182/files/12796113173.pdf
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/vixaxexozif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riwemabosemuridaredexe.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/r

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000620a.bin
71cee7ebc48d83bbb92de691e0157edc655b66823a630f2b6d9d326589cbd332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620A 5604 bytes
font_01_sfnt_off000074e1.bin
7a70a374e0ffb96dd12fa44306ef1a347c1d686ef4c669ddd2a37439542b5a06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E1 9972 bytes

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