Malicious PDF — malware analysis report

Static analysis result for SHA-256 145aaebd0cd4368c…

MALICIOUS

PDF

68.5 KB Created: 2020-08-04 08:38:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0debe34f7a976b9ebda9da2f954fa809 SHA-1: 6824523c25ca938571ea7fc14481f46e98a69e00 SHA-256: 145aaebd0cd4368c51aec9d209d417e366f43c14ddaf16c3e1f7fc7a60b7a890
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised with a seemingly benign document title. It also hosts a large number of external PDF links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness, and the embedded URL is a primary indicator of malicious intent.

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=nadhom+asmaul+husna+latin+pdf
    • http://zapuw.g-square.org/uploads/1/3/2/7/132710703/0ee584.pdf
    • http://ragiro.yauno.nl/uploads/1/3/1/6/131607712/wigetenuja_vujigo_nevode.pdf
    • http://files.drivertraininggoforit.com/uploads/1/3/1/8/131856649/tivokipivakow.pdf
    • http://files.theconsciouscosmetologist.com/uploads/1/3/0/7/130739247/jojijowome.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3723/7148/files/nulisaxemuxopad.pdf
    • https://cdn.shopify.com/s/files/1/0433/7637/8014/files/22345159359.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/xenazukalusosegusikajo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5396/3678/files/power_smokeless_grill_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/papuravewozonudotapox.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/namevigawixe.pdf
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/fikorererazuwiburunazalob.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/tubigajezefogija.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0988/files/git_hub_login.pdf
    • https://cdn.shopify.com/s/files/1/0430/9381/9541/files/45439773983.pdf
    • https://cdn.shopify.com/s/files/1/0433/0913/8075/files/zanudububumesi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6135/3371/files/79065432124.pdf
    • https://cdn.shopify.com/s/files/1/0430/0960/5791/files/fogesivoxudeduweketuvajal.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000cdc4.bin
49108980d57ac9fb87ba9c48b5907adde3088857effad01ab204162f91bafff5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCDC4 31252 bytes
font_00_sfnt_off00008fd9.bin
e4b1899eaa12078c94c24fb940da47d06c086cd563a725b3cf1b2fa53b74219b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD9 5156 bytes
font_01_sfnt_off0000a144.bin
0b3d6689ffd38f24d5062bd2a57b215c88f6887995ffd8ab09a95735fdbf128f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA144 14264 bytes

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