Malicious PDF — malware analysis report

Static analysis result for SHA-256 97150c9a5406c7bd…

MALICIOUS

PDF

45.1 KB Created: 2020-08-20 20:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14c855d5032562341c10684ffda3dcf2 SHA-1: eed41ef408e6a71f7644a4eb97666910e485113b SHA-256: 97150c9a5406c7bd68ac8e8084ea4eb3dde9f4d00ea16b39ccb67c0efaf49b1b
152 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=hd+online.+is+apk', which is flagged as a malicious redirector. This suggests the document's primary purpose is to lure the user to a malicious site, likely for phishing or malware delivery.

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=hd+online.+is+apk
    • http://files.rodanthesurfshop.com/uploads/1/3/1/4/131409128/1236349.pdf
    • http://files.hollygunn.com/uploads/1/3/1/6/131606968/gaxowes.pdf
    • http://files.julessalonandbarbering.com/uploads/1/3/1/0/131070420/4322399.pdf
    • http://files.childrenofthekingdom.net/uploads/1/3/0/8/130873902/8047379.pdf
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/blaze_black_2.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/97216552099.pdf
    • https://cdn.shopify.com/s/files/1/0430/9653/9290/files/synonyms_and_antonyms_for_ssc.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/lerufomukomigipalawowusu.pdf
    • https://cdn.shopify.com/s/files/1/0438/5298/8566/files/metodo_anticonceptivo_diu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1244/7652/files/86516359607.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/lidiforedivamoxemi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/asana_pranayama_mudra_bandha_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/fukonobagapivoropupab.pdf
    • https://cdn.shopify.com/s/files/1/0434/9463/7734/files/99553207999.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1354/files/kosasukujogofuvosot.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_off0000629e.bin
b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x629E 6744 bytes
font_01_sfnt_off00007383.bin
d8d588b7a85e54babbfbd60260b2aa540feb5c16fdf65bc9bcce79f0d02a4830		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7383 4912 bytes
font_02_sfnt_off00008451.bin
d3be31b4f628a5ebae16823d886d0d9ab687a8b06822bb76842b1b9d51aa52a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8451 10320 bytes

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