Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aacbe682562167c…

MALICIOUS

PDF

65.9 KB Created: 2020-08-12 04:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11285d367316ed7d270aade951f61f5f SHA-1: 30ebe783aebb762eaf0a86198e1897ea4e03398e SHA-256: 8aacbe682562167cbdaaecb197791c8bfb7b56f3f55b2f6ed546deecbd54046d
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, appears to contain the same URL, suggesting the primary purpose is to drive traffic to malicious sites.

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=introduction+to+the+design+and+analysis+of+algorithms+solutions+pdf
    • http://sofivu.filmaim.com/uploads/1/3/0/7/130776791/6c8aed.pdf
    • http://files.tamaraarmstrong.com.au/uploads/1/3/1/0/131070846/9151384.pdf
    • http://files.jberaeroclub.com/uploads/1/3/0/8/130874646/lasopuxuzofijofapowu.pdf
    • http://files.knzcreativedesigns.com/uploads/1/3/1/0/131070294/zuropuju.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5274/files/41468685756.pdf
    • https://cdn.shopify.com/s/files/1/0429/7195/5351/files/96169427437.pdf
    • https://cdn.shopify.com/s/files/1/0437/5583/1445/files/marriage_d_amour_guitar_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kulabegidubonigupux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49839171509.pdf
    • https://cdn.shopify.com/s/files/1/0434/1714/1415/files/biology_form_5_chapter_1_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/56745223561.pdf
    • https://cdn.shopify.com/s/files/1/0428/2544/9628/files/83953046280.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/call_center_metrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0021/files/36244881296.pdf
    • https://cdn.shopify.com/s/files/1/0434/5869/1232/files/55017828587.pdf
    • https://cdn.shopify.com/s/files/1/0436/0224/7838/files/puvibilifolamogibuxagu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2598/8757/files/metafsica_aristotlica.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/11756854134.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f2d.bin
687af83b94db470bdcb0d9a782ada8a7412fc118339945862b8a2b84f0551d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2D 23864 bytes
font_01_sfnt_off0000aa08.bin
ec1832ac79050bda935ca7e67be19a9a757c38dc0cd165837ecc73634c1f9282		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA08 5488 bytes
font_02_sfnt_off0000bc89.bin
de9fb53a516660a6932795a845600f8f15f3ca48a4609f8d37e04c94ea66bcb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC89 15148 bytes
font_03_sfnt_off0000eb56.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB56 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.