Malicious PDF — malware analysis report

Static analysis result for SHA-256 305b518e264b9ec9…

MALICIOUS

PDF

53.9 KB Created: 2020-09-02 10:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4fbadb753aa9efb07e4678ea8c228c7 SHA-1: 49a6940770b5291933cddac1ebd3d4214354f8d0 SHA-256: 305b518e264b9ec9ec497cd22b0367037935d108cce557127fcf214d8d73eacb
152 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=home+dream+level+301+answers'. This URL is presented within the document body, suggesting a phishing or social engineering attempt to direct the user to malicious infrastructure. The presence of a large number of external PDF links, many pointing to Shopify, further indicates a link farm or SEO manipulation tactic, likely to obscure the malicious redirector.

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.link/wix?keyword=home+dream+level+301+answers
    • https://cdn.shopify.com/s/files/1/0431/3281/3473/files/71782259002.pdf
    • https://cdn.shopify.com/s/files/1/0435/3196/0474/files/sodema.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/gaxumuj.pdf
    • https://static.usrfiles.com/ugd/c345b0_c67d023e9b59498c9dbcd18cb32d97e0.pdf
    • https://static.usrfiles.com/ugd/a86d68_216835ed3dbb4a99999eea7d80b769a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_bedd59bc3608430b8d6daa71dfe55e40.pdf
    • https://static.usrfiles.com/ugd/e78b77_0439880a053848c29c9d84381c4ed879.pdf
    • https://static.usrfiles.com/ugd/756799_e2f4738d9e7a40018ff94a73792423de.pdf
    • https://static.usrfiles.com/ugd/cac9e4_f9e5c186810c45d7a5772abe6c0b42cc.pdf
    • https://static.usrfiles.com/ugd/d5d855_0641e1bac3db424c849d8ed654a41af2.pdf
    • https://static.usrfiles.com/ugd/f523c3_46b235faa9c243258c70df1684cd6e67.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a732257756748bb83d6effb9cc50883.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/fasexijavukumo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1897/6408/files/29415328149.pdf
    • https://cdn.shopify.com/s/files/1/0433/5783/1326/files/13490293339.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/61968054329.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c81.bin
04f389ddd37f6afc642d79047c0c380491dfcee3c75704b337d95182d7bb579e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C81 5440 bytes
font_01_sfnt_off00009efa.bin
42108f4c83778637a29bf3401bbdf00f4eb7602ba4ecb6e762d5d4f33e4d065e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EFA 14156 bytes