Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f4e59e1ce378839…

MALICIOUS

PDF

37.4 KB Created: 2020-09-06 20:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d163e96ddf66fa8f791d1ee81d513f6b SHA-1: 30e321e7dc2c3a2474bf360def151172550f2e51 SHA-256: 1f4e59e1ce3788391d7e78b4716402bd3513336edcd1e955764e5bdcb03e8e95
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/pify?keyword=joyous+celebration+21+songs+list', suggesting a lure to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous external PDF links.

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/pify?keyword=joyous+celebration+21+songs+list
    • https://cdn.shopify.com/s/files/1/0436/5369/3593/files/linojegim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0697/5382/files/socialismo_y_comunismo_marta_harnecker.pdf
    • https://cdn.shopify.com/s/files/1/0433/8152/2599/files/4chan_expand_all_images.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/yds_ingilizce_e_anlaml_kelimeler_p.pdf
    • https://static.usrfiles.com/ugd/9ec29b_8e222887eacc4822b70d3a5c1389bd47.pdf
    • https://static.usrfiles.com/ugd/8b9728_0320944f02574cc3a992aa45a346f944.pdf
    • https://static.usrfiles.com/ugd/c33f71_0ca4bf02c03b454a8519e4fd0927f1b3.pdf
    • https://static.usrfiles.com/ugd/599f1c_2a6d233ad8584199abb69e2ee4b1909f.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84511803825.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/brisingr_portugues.pdf
    • https://static.usrfiles.com/ugd/062c90_8649f4e67df84c729f950173bd4eb89e.pdf
    • https://static.usrfiles.com/ugd/1849a1_e9134256fa99491fbcbe65f5e9a26ddb.pdf
    • https://static.usrfiles.com/ugd/e2b09b_73cda8f06fec47fe8630a4c28f14d4a8.pdf
    • https://static.usrfiles.com/ugd/a32c20_86b96ddc7b434802ab653d96af6c303a.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_off00004752.bin
dd5f7a2413dd8a7b35f4c11ee0502299f8593e9cc6055112050d09d381a60b53
pdf-font-stream PDF embedded font (sfnt) at offset 0x4752 5264 bytes
font_01_sfnt_off0000594b.bin
0aca2669faf5f158cfc46a44215df3ecd8cd86c0591bc4f88d0242c19ddea1dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x594B 9784 bytes
font_02_sfnt_off00007ade.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADE 4324 bytes