Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8c8d930140291c…

MALICIOUS

PDF

42.1 KB Created: 2020-08-13 23:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fb647088debe94df425db36a2a50d22 SHA-1: bda20350e6cccb9819e7181ff64b41b943eb212b SHA-256: 5e8c8d930140291c529a1156642c8d5bba029789899c7f5161c5f26d1db799f0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'tap tap heroes rune guide' and a URL that is flagged as malicious. This suggests a phishing or scam attempt to redirect users to malicious content.

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=tap+tap+heroes+rune+guide
    • http://kususe.silveradodance.com/uploads/1/3/0/7/130776046/gasimaxa.pdf
    • http://files.harmonyhypnosiscenter.com/uploads/1/3/0/7/130738779/4399582.pdf
    • http://rutenox.sersproducts.com/uploads/1/3/0/7/130738970/43b862d046b.pdf
    • http://rinigu.dapperandtravel.com/uploads/1/3/1/0/131069899/zeserojexijadid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/arduino_mega_2560_ch340_schematic.pdf
    • https://cdn.shopify.com/s/files/1/0429/0281/4876/files/bumisawazuduxigu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/5229919716.pdf
    • https://cdn.shopify.com/s/files/1/0437/7437/8142/files/luwexapawinerurovezegalu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sovir.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/fidutataturapupuvinir.pdf
    • https://cdn.shopify.com/s/files/1/0437/0196/0854/files/dolidofevenevogevoxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5922/files/dapotajozofowo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luzugojozawok.pdf
    • https://cdn.shopify.com/s/files/1/0434/4800/8866/files/lulijineperivibezereme.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5567/files/82298891569.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/burepawodositosobaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/sidurilobekesijipegax.pdf
    • https://cdn.shopify.com/s/files/1/0432/8108/8670/files/4809708084.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006673.bin
517bc218b9aacd50ceb37cc9d04af8e173e7d758111476604128427fda80e090		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6673 5136 bytes
font_01_sfnt_off000077e2.bin
6b29b2009072e2e2f10408a8f13de3cbefa8cd45a3dcb654dc6b93bde918bb22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77E2 10572 bytes

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