Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0350a3fb3160c05…

MALICIOUS

PDF

35.7 KB Created: 2020-08-23 08:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d55f716b92340aca7971a5fcb482618c SHA-1: 6fa2d46d32b195ce882a91e3c0d8582f78022434 SHA-256: e0350a3fb3160c05e8a26f22a3c68e868dfc66666cc19acdbb8e816102ca2ff1
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is flagged as malicious. The document body, though heavily obfuscated, appears to contain text related to 'cpm homework answers cc3' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also hosts a large number of external links, many pointing to Shopify, likely as part of a link farm to improve SEO for malicious content.

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.com/pify?keyword=cpm+homework+answers+cc3
    • http://files.wileyscience.com/uploads/1/3/1/4/131454850/jewezapukagoji.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/sasuzojopa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kirojaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/xawesufulepijuwatu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3434/5625/files/acta_constitutiva_de_una_sociedad_civil_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/dvd_shrink_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/63843881437.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5225/files/pofasafugi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7201/files/lelifexozi.pdf
    • https://cdn.shopify.com/s/files/1/0460/1774/0967/files/23109996408.pdf
    • https://cdn.shopify.com/s/files/1/0432/3544/2855/files/how_to_convert_string_to_int_c.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0047/files/buzerajugaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/xavupetabebogemir.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/86955565174.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_off000042b4.bin
84877493eee6e449f82dc401bce3591c2270f14943b3868cb3cd8c9e122bb82e
pdf-font-stream PDF embedded font (sfnt) at offset 0x42B4 5144 bytes
font_01_sfnt_off0000540b.bin
79e64f027593046fc66134a291e8da4265a10255702df8b3fd39e10ff1219428
pdf-font-stream PDF embedded font (sfnt) at offset 0x540B 9444 bytes
font_02_sfnt_off00007433.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x7433 4324 bytes