Malicious PDF — malware analysis report

Static analysis result for SHA-256 1857aba062b642ef…

MALICIOUS

PDF

39.8 KB Created: 2020-08-26 05:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4637981bc83788b04a92cdb89e6b44c1 SHA-1: 1dc3905ab18fe700a83ce80dfbca1cf7f3d78923 SHA-256: 1857aba062b642ef9d359045e5de33f3a8f52adc9b99e6ff70ee02a193a627e9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector service, which is a common tactic for distributing malware or leading users to phishing sites. The document body, though heavily obfuscated, contains text related to a product manual, suggesting a lure to encourage clicks. The presence of numerous external links, many pointing to Shopify, indicates a link farm or content stuffing technique to obscure the malicious intent.

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=slinglink+turbo+w1+sl300-100+manual
    • http://gamutilu.berefresh.com/uploads/1/3/1/4/131483254/f3892b78c5fdc.pdf
    • http://qwz.cloudz.pw/download?file=slinglink+turbo+w1+sl3
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8460/1752/files/nowawuxafidodu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/galafanuwik.pdf
    • https://cdn.shopify.com/s/files/1/0435/5588/1111/files/xamotafebofilesufusake.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/what_is_the_square_root_of_35.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68513135127.pdf
    • https://cdn.shopify.com/s/files/1/0437/2643/8550/files/jitujuvisekolugewolisef.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/23505059073.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2101/files/rugazexeropixijedonutuba.pdf
    • https://cdn.shopify.com/s/files/1/0452/4238/4545/files/issuu_download_online.pdf
    • https://cdn.shopify.com/s/files/1/0438/4364/9698/files/humoral_and_cell_mediated_immunity.pdf
    • https://cdn.shopify.com/s/files/1/0429/3761/4499/files/hotel_business_plan_in_kenya.pdf
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/miporilanojo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/volcanoes_earth_shattering_news_reading_passage_answer.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a19.bin
d4bb5d1977fd4c485af59dc625e821f81a12a2476694f078738b1a1111c12cd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A19 5792 bytes
font_01_sfnt_off00006dd2.bin
90bad339f28745c120d6993272a19242c5aa92ed5e38a894271b75e0f0b03cb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD2 10836 bytes