Malicious PDF — malware analysis report

Static analysis result for SHA-256 52533e377bbd6f6e…

MALICIOUS

PDF

45.0 KB Created: 2020-08-07 15:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf9b4795250adb160efd4acc15024e23 SHA-1: 30bc64d3e432422d4aa5aafd52caed57ef214b2a SHA-256: 52533e377bbd6f6e5e19d32f813f428023d434d7fb0fbfd251d59b4624181ebf
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farms. One critical link directs to a known malicious redirector at `https://ttraff.ru/pify?keyword=autodesk+inventor+2020+what+s+new+pdf`, suggesting the document is designed to lead users to malicious content. The ML classifier also strongly indicated maliciousness.

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=autodesk+inventor+2020+what+s+new+pdf
    • http://files.barndoorllc.com/uploads/1/3/2/3/132302924/73f4fd7b4ee401.pdf
    • http://files.emmausbaseball.com/uploads/1/3/1/3/131397971/wevudizuseke.pdf
    • http://files.normaniclothing.com/uploads/1/3/1/8/131858592/vozegunowilulupezej.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/12779958366.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7542/files/batho_pele_principles_explained.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/1699066890.pdf
    • https://cdn.shopify.com/s/files/1/0432/5883/9198/files/bowuxovijo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/poultry_management_practices.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4920/files/filariasis_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0431/5699/6247/files/furos.pdf
    • https://cdn.shopify.com/s/files/1/0434/1959/9004/files/59748171502.pdf
    • https://cdn.shopify.com/s/files/1/0435/7727/8627/files/vufasafipokaniweritoluni.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/53651151046.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/8457486410.pdf
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/36522596041.pdf
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/rixaduj.pdf
    • https://cdn.shopify.com/s/files/1/0428/5100/8671/files/2715818010.pdf
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/bejoxupakopakanaborezup.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_off000063ed.bin
85d03968d33be7fc41952018327ee850235a694432be55cbf1d6faf8340672d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63ED 5456 bytes
font_01_sfnt_off00007688.bin
ad6fd6ce43c1062321cd802f49a4fbd01ca12830ada3e2404e70e238fae55fcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7688 9980 bytes
font_02_sfnt_off000098a1.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98A1 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.